{"product_id":"co2-laser-reflective-mirror-molybdenum-20-mm-diameter-3-mm-thick-3-pack","title":"CO2 Laser Reflective Mirror, Molybdenum, 20 mm Diameter, 3 mm Thick (3 Pack)","description":"\u003cdiv style=\"font-family:Roboto,sans-serif;color:#1a1a1a;line-height:1.6\"\u003e\n\u003cstyle\u003e@import url('https:\/\/fonts.googleapis.com\/css2?family=Roboto+Condensed:wght@700\u0026family=Roboto:wght@400;700;900\u0026display=swap');.spm-c{border:1px solid #d1d1d1;background:#fff;margin-bottom:25px;overflow:hidden}.spm-h{padding:15px 20px;background:#ffce02;border-bottom:1px solid #d1d1d1;font-weight:900;text-transform:uppercase;font-size:16px;color:#000;letter-spacing:.05em;font-family:'Roboto Condensed',sans-serif}.spm-t{width:100%;border-collapse:collapse;font-size:15px}.spm-t th{padding:12px 10px;text-align:left;background:#f4f4f4;font-size:12px;text-transform:uppercase;letter-spacing:.04em;border-bottom:1px solid #d1d1d1;color:#000}.spm-t td{padding:11px 10px;border-bottom:1px solid #eee;text-align:left;vertical-align:top}.spmL{font-weight:700;color:#333;background:#fcfcfc;width:38%}.spm-sub{display:block;color:#777;font-size:12.5px;margin-top:2px}.spm-chip{display:inline-block;margin:0 8px 8px 0;padding:6px 12px;border:1px solid #d1d1d1;background:#fcfcfc;font-size:14px;font-weight:700;color:#000}.spm-h2{font-family:'Roboto Condensed',sans-serif;font-size:24px;font-weight:900;color:#000;text-transform:uppercase;margin:40px 0 20px;letter-spacing:.05em;border-bottom:3px solid #ffce02;padding-bottom:15px}.spm-p{font-size:16px;line-height:1.8;margin:0 0 18px}@media(max-width:700px){.spmL{width:auto}}\u003c\/style\u003e\n\u003cp class=\"spm-p\"\u003ePack of three molybdenum (Mo) reflective mirrors for CO2 laser engravers and cutters, each 20 mm in diameter and 3 mm thick. A CO2 machine uses three of them to carry the beam from the tube to the head: the first sits at the tube end, the second on the gantry and the third in the head above the focus lens.\u003c\/p\u003e\n\u003cp class=\"spm-p\"\u003eMolybdenum mirrors are solid metal, polished flat with no coating, and reflect about 94% or more of the 10.6 µm beam. Because there is no coating to scratch or burn off, they put up with frequent cleaning, smoke and dust better than coated mirrors. Gold coated silicon reflects a few percent more; molybdenum is the tougher choice for dusty shops and machines that need their mirrors wiped often.\u003c\/p\u003e\n\u003cp class=\"spm-p\"\u003eCheck the diameter (20 mm) and thickness (3 mm) of the mirrors in your mounts before ordering, and realign the beam after fitting.\u003c\/p\u003e\n\u003ch2 class=\"spm-h2\"\u003eTechnical Properties \u0026amp; Sizes\u003c\/h2\u003e\n\u003cdiv class=\"spm-c\"\u003e\n\u003cdiv class=\"spm-h\"\u003eSpecifications\u003c\/div\u003e\n\u003ctable class=\"spm-t\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"spmL\"\u003ePart type\u003c\/td\u003e\n\u003ctd\u003eReflective (beam delivery) mirror for CO2 lasers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"spmL\"\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eMolybdenum (Mo), polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"spmL\"\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eNone (solid metal reflective face)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"spmL\"\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e20 mm (25\/32 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"spmL\"\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e3 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"spmL\"\u003eWavelength\u003c\/td\u003e\n\u003ctd\u003e10.6 µm (CO2 laser)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"spmL\"\u003eReflectivity\u003c\/td\u003e\n\u003ctd\u003eAbout 94% or more at 10.6 µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"spmL\"\u003eSold as\u003c\/td\u003e\n\u003ctd\u003ePack of 3 mirrors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"spmL\"\u003eCountry of Manufacture\u003c\/td\u003e\n\u003ctd\u003eChina\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spm-c\"\u003e\n\u003cdiv class=\"spm-h\"\u003eCompatibility\u003c\/div\u003e\n\u003cdiv style=\"padding:20px\"\u003e\n\u003cp style=\"margin:0 0 10px;font-weight:700;color:#333\"\u003eCO2 laser mirror mounts that hold a 20 mm x 3 mm mirror\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cspan class=\"spm-chip\"\u003eFirst, second and third mirror mounts\u003c\/span\u003e\u003cspan class=\"spm-chip\"\u003eCO2 engravers and flatbed cutters\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:13px;color:#666;margin:0 0 18px\"\u003eMeasure the old mirror: it must be 20 mm across and 3 mm thick to sit flat in the mount. Other size in this range: 25 mm x 3 mm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spm-c\"\u003e\n\u003cdiv class=\"spm-h\"\u003ePart Numbers\u003c\/div\u003e\n\u003cdiv style=\"overflow-x:auto\"\u003e\u003ctable class=\"spm-t\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003cth\u003ePart No.\u003cspan class=\"spm-sub\"\u003e(SPM Part No.)\u003c\/span\u003e\n\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e20 mm diameter, 3 mm thick\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan style=\"color:#999\"\u003eStandard size\u003c\/span\u003e\u003cspan class=\"spm-sub\"\u003e(SPM-CO2-1019)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 class=\"spm-h2\"\u003eApplications \u0026amp; Use Cases\u003c\/h2\u003e\n\u003cp class=\"spm-p\"\u003e\u003cstrong\u003eMatching your machine\u003c\/strong\u003e\u003cbr\u003e20 mm mirrors are the usual size on small and mid size glass tube engravers (40 to 80 W), including the common K40 style and 50 W desktop machines.\u003c\/p\u003e\n\u003cp class=\"spm-p\"\u003e\u003cstrong\u003eDusty or smoky work\u003c\/strong\u003e\u003cbr\u003eCutting MDF, leather or rubber puts a lot of residue on the beam path. A molybdenum mirror can be wiped as often as needed without wearing through a coating.\u003c\/p\u003e\n\u003cp class=\"spm-p\"\u003e\u003cstrong\u003eReplacing a damaged mirror\u003c\/strong\u003e\u003cbr\u003eA mirror hit by a misaligned beam or left dirty can pit or scorch. Replacing all three keeps the beam path even.\u003c\/p\u003e\n\u003cp class=\"spm-p\"\u003e\u003cstrong\u003eA full spare set\u003c\/strong\u003e\u003cbr\u003eThree mirrors in one pack let you replace the whole beam path at once, or keep spares in the drawer so a damaged mirror costs minutes, not days.\u003c\/p\u003e\n\u003ch2 class=\"spm-h2\"\u003ePrice Beat Guarantee\u003c\/h2\u003e\n\u003c!-- spm-pricebeat --\u003e\u003cp style=\"font-size:15px;line-height:1.8;margin:0 0 16px\"\u003eWe check what other aftermarket sellers charge for this same part. Their prices on the date we checked:\u003c\/p\u003e\n\u003cdiv style=\"overflow-x:auto;margin:0 0 16px\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;border:1px solid #e2e2e2\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:10px 14px;background:#1a1a1a;color:#fff;font-size:13px;text-transform:uppercase;letter-spacing:.05em\"\u003eSeller\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:10px 14px;background:#1a1a1a;color:#fff;font-size:13px;text-transform:uppercase;letter-spacing:.05em\"\u003ePrice\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:10px 14px;background:#1a1a1a;color:#fff;font-size:13px;text-transform:uppercase;letter-spacing:.05em\"\u003eChecked\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px 14px;border-bottom:1px solid #e2e2e2;font-size:15px\"\u003eOMTech (Wood Art Supply) (pack of 3)\u003c\/td\u003e\n\u003ctd style=\"padding:10px 14px;border-bottom:1px solid #e2e2e2;font-size:15px\"\u003eUSD 21.24\u003c\/td\u003e\n\u003ctd style=\"padding:10px 14px;border-bottom:1px solid #e2e2e2;font-size:15px\"\u003e21 Oct 2026\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px 14px;border-bottom:1px solid #e2e2e2;font-size:15px\"\u003eOMTech (pack of 3)\u003c\/td\u003e\n\u003ctd style=\"padding:10px 14px;border-bottom:1px solid #e2e2e2;font-size:15px\"\u003eUSD 31.99\u003c\/td\u003e\n\u003ctd style=\"padding:10px 14px;border-bottom:1px solid #e2e2e2;font-size:15px\"\u003e21 Oct 2026\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px 14px;border-bottom:1px solid #e2e2e2;font-size:15px;font-weight:700;background:#fff8d6\"\u003eSpare Part Mart (pack of 3)\u003c\/td\u003e\n\u003ctd style=\"padding:10px 14px;border-bottom:1px solid #e2e2e2;font-size:15px;font-weight:700;background:#fff8d6\"\u003eUSD 16.99\u003c\/td\u003e\n\u003ctd style=\"padding:10px 14px;border-bottom:1px solid #e2e2e2;font-size:15px;font-weight:700;background:#fff8d6\"\u003eToday\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp style=\"font-size:15px;line-height:1.8;margin:0 0 16px\"\u003eOur price of USD 16.99 is 20% to 47% less than these sellers.\u003c\/p\u003e\n\u003cp style=\"font-size:15px;line-height:1.8;margin:0 0 16px\"\u003eFound this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our \u003ca href=\"\/pages\/find-it-cheaper-we-will-beat-it-by-5\" style=\"color:#000;text-decoration:underline\"\u003ePrice Beat Guarantee\u003c\/a\u003e. Every order is also covered by our \u003ca href=\"\/pages\/30-day-money-back-guarante\" style=\"color:#000;text-decoration:underline\"\u003e30 day money back guarantee\u003c\/a\u003e.\u003c\/p\u003e\n\u003c!-- \/spm-pricebeat --\u003e\u003ch2 class=\"spm-h2\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom:22px;padding:15px;background:#f9f9f9;border-left:4px solid #ffce02\"\u003e\n\u003ch4 style=\"margin:0 0 8px;font-size:15px;font-weight:700\"\u003eHow do I know these mirrors fit my machine?\u003c\/h4\u003e\n\u003cp style=\"margin:0;font-size:14px;line-height:1.7;color:#333\"\u003eTake one mirror out of its mount and measure it. These are 20 mm in diameter and 3 mm thick. Most engravers use 20 mm or 25 mm mirrors; the size is often listed in the machine manual.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:22px;padding:15px;background:#f9f9f9;border-left:4px solid #ffce02\"\u003e\n\u003ch4 style=\"margin:0 0 8px;font-size:15px;font-weight:700\"\u003eMolybdenum or silicon?\u003c\/h4\u003e\n\u003cp style=\"margin:0;font-size:14px;line-height:1.7;color:#333\"\u003eGold coated silicon reflects slightly more of the beam. Molybdenum has no coating, so it tolerates hard cleaning and dirty air much better. Many shops use molybdenum in the first two positions where dust collects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:22px;padding:15px;background:#f9f9f9;border-left:4px solid #ffce02\"\u003e\n\u003ch4 style=\"margin:0 0 8px;font-size:15px;font-weight:700\"\u003eWhich side faces the beam?\u003c\/h4\u003e\n\u003cp style=\"margin:0;font-size:14px;line-height:1.7;color:#333\"\u003eThe polished, mirror smooth face goes toward the beam. The back is left plain.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:22px;padding:15px;background:#f9f9f9;border-left:4px solid #ffce02\"\u003e\n\u003ch4 style=\"margin:0 0 8px;font-size:15px;font-weight:700\"\u003eDo I need to realign after fitting?\u003c\/h4\u003e\n\u003cp style=\"margin:0;font-size:14px;line-height:1.7;color:#333\"\u003eYes. Swapping a mirror can shift the beam slightly. Check alignment with a test pulse on tape at each mirror, starting from the first, before running a job.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:22px;padding:15px;background:#f9f9f9;border-left:4px solid #ffce02\"\u003e\n\u003ch4 style=\"margin:0 0 8px;font-size:15px;font-weight:700\"\u003eIs it a genuine part?\u003c\/h4\u003e\n\u003cp style=\"margin:0;font-size:14px;line-height:1.7;color:#333\"\u003eNo. These are aftermarket molybdenum mirrors made to the standard sizes used on most CO2 engravers and cutters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:22px;padding:15px;background:#f9f9f9;border-left:4px solid #ffce02\"\u003e\n\u003ch4 style=\"margin:0 0 8px;font-size:15px;font-weight:700\"\u003eHow do I clean them?\u003c\/h4\u003e\n\u003cp style=\"margin:0;font-size:14px;line-height:1.7;color:#333\"\u003eWipe the face with lens tissue and optical grade alcohol or acetone. Molybdenum is hard, but avoid abrasive cloths and never touch the face with bare fingers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-top:50px;display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:#d1d1d1;border:1px solid #d1d1d1;margin-bottom:20px\" class=\"spm-trust\"\u003e\n\u003ca href=\"\/pages\/30-day-money-back-guarante\" style=\"background:#fff;padding:40px 15px;text-decoration:none;display:flex;flex-direction:column;align-items:center;text-align:center;color:#1a1a1a\"\u003e\u003csvg style=\"width:32px;height:32px;margin-bottom:15px;fill:#ffce02\" viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M12 1L3 5v6c0 5.55 3.84 10.74 9 12 5.16-1.26 9-6.45 9-12V5l-9-4zm-2 16l-4-4 1.41-1.41L10 14.17l6.59-6.59L18 9l-8 8z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003cspan style=\"font-family:'Roboto Condensed',sans-serif;font-weight:700;text-transform:uppercase;font-size:11px;letter-spacing:0.1em\"\u003e30-Day Money Back Guarantee\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/pages\/delivery-information\" style=\"background:#fff;padding:40px 15px;text-decoration:none;display:flex;flex-direction:column;align-items:center;text-align:center;color:#1a1a1a\"\u003e\u003csvg style=\"width:32px;height:32px;margin-bottom:15px;fill:#ffce02\" viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-1 17.93c-3.95-.49-7-3.85-7-7.93 0-.62.08-1.21.21-1.79L9 15v1c0 1.1.9 2 2 2v1.93zm6.9-2.54c-.26-.81-1-1.39-1.9-1.39h-1v-3c0-.55-.45-1-1-1H8v-2h2c.55 0 1-.45 1-1V7h2c1.1 0 2-.9 2-2v-.41c2.93 1.19 5 4.06 5 7.41 0 2.08-.8 3.97-2.1 5.39z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003cspan style=\"font-family:'Roboto Condensed',sans-serif;font-weight:700;text-transform:uppercase;font-size:11px;letter-spacing:0.1em\"\u003eWorldwide Delivery\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/pages\/find-it-cheaper-we-will-beat-it-by-5\" style=\"background:#fff;padding:40px 15px;text-decoration:none;display:flex;flex-direction:column;align-items:center;text-align:center;color:#1a1a1a\"\u003e\u003csvg style=\"width:32px;height:32px;margin-bottom:15px;fill:#ffce02\" viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M21.41 11.58l-9-9C12.05 2.22 11.55 2 11 2H4c-1.1 0-2 .9-2 2v7c0 .55.22 1.05.59 1.42l9 9c.36.36.86.58 1.41.58.55 0 1.05-.22 1.41-.59l7-7c.37-.36.59-.86.59-1.41 0-.55-.23-1.06-.59-1.42zM5.5 8.25c-.69 0-1.25-.56-1.25-1.25s.56-1.25 1.25-1.25 1.25.56 1.25 1.25-.56 1.25-1.25 1.25z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003cspan style=\"font-family:'Roboto Condensed',sans-serif;font-weight:700;text-transform:uppercase;font-size:11px;letter-spacing:0.1em\"\u003ePrice Beat Guarantee\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@graph\": [{\"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"How do I know these mirrors fit my machine?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Take one mirror out of its mount and measure it. These are 20 mm in diameter and 3 mm thick. Most engravers use 20 mm or 25 mm mirrors; the size is often listed in the machine manual.\"}}, {\"@type\": \"Question\", \"name\": \"Molybdenum or silicon?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Gold coated silicon reflects slightly more of the beam. Molybdenum has no coating, so it tolerates hard cleaning and dirty air much better. Many shops use molybdenum in the first two positions where dust collects.\"}}, {\"@type\": \"Question\", \"name\": \"Which side faces the beam?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The polished, mirror smooth face goes toward the beam. The back is left plain.\"}}, {\"@type\": \"Question\", \"name\": \"Do I need to realign after fitting?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. Swapping a mirror can shift the beam slightly. Check alignment with a test pulse on tape at each mirror, starting from the first, before running a job.\"}}, {\"@type\": \"Question\", \"name\": \"Is it a genuine part?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. These are aftermarket molybdenum mirrors made to the standard sizes used on most CO2 engravers and cutters.\"}}, {\"@type\": \"Question\", \"name\": \"How do I clean them?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Wipe the face with lens tissue and optical grade alcohol or acetone. Molybdenum is hard, but avoid abrasive cloths and never touch the face with bare fingers.\"}}]}]}\u003c\/script\u003e","brand":"Spare Part Mart","offers":[{"title":"Default Title","offer_id":67643992539436,"sku":"SPM-CO2-1019","price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/9152\/6700\/files\/spm_0_422d6e6d-2836-4850-af9e-8f5aed4caa84.jpg?v=1792555446","url":"https:\/\/sparepartmart.co\/products\/co2-laser-reflective-mirror-molybdenum-20-mm-diameter-3-mm-thick-3-pack","provider":"Spare Part Mart","version":"1.0","type":"link"}