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Aftermarket seal ring for the protective lens drawer of Qilin handheld welding guns. The seal holds the 20 x 2 mm protective lens flat and stops fume and shielding gas getting past it to the focusing lens.
20.5 x 16 x 2.5 mm (outside diameter x inside diameter x thickness). High temperature PTFE with a stainless steel spring core. Replace the seal when it is flattened, hard or discoloured, ideally every few lens changes. Sold singly or in packs of 5 or 10.
| Size | 20.5 x 16 x 2.5 mm (OD x ID x T) |
| Material | PTFE with stainless steel spring |
| Protective Lens | 20 x 2 mm |
| Fits | Qilin handheld welding guns |
| Pack Options | 1, 5 or 10 seals |
Handheld welding guns
Check the size against the part you are replacing.
| Gun | Specification | Fits | SPM Part Number(OEM no. where one exists) |
|---|---|---|---|
| Qilin, 20.5 x 16 x 2.5 mm (20 x 2 lens) | 20.5 x 16 x 2.5 mm | Qilin handheld | SPM-LAS-2182 |
| Gun | Fits |
|---|---|
| SUP, 21 x 15 x 2.7 mm (18 x 2 lens) | SUP20S, SUP20T, SUP21T, SUP23S, SUP23T, SW150 |
| WSX, 20.5 x 16 x 2.4 mm (18 x 2 lens) | WSX handheld |
| Ospri, 21 x 15 x 3 mm (20 x 3 lens) | Ospri handheld |
| Hanwei, 22 x 16 x 2.9 mm (20 x 4 lens) | Hanwei handheld |
Lens keeps cracking
A hard or flattened seal lets the protective lens shift and heat unevenly. If lenses crack early, change the seal.
Dirty focusing lens
Fume that gets past a worn seal settles on the focusing lens. A new seal keeps the optics clean.
Lens changes
Keep seals with your protective lenses and change both together every few lens changes.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| Startnow | USD 5.60 | 8 Oct 2026 |
| Spare Part Mart | USD 4.48 | Today |
Our price of USD 4.48 is approximately 20% less than this seller.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
It fits Qilin handheld welding guns with the 20 x 2 mm protective lens. Measure the old seal: it should be 20.5 x 16 x 2.5 mm (outside diameter x inside diameter x thickness).
No. They are aftermarket seals made to the same size. The gun name is given so you can choose the right one.
Yes. Shipping options and costs for your country are shown at checkout.
Prices depend on your postcode.
In USD for the quantity selected. The exact cost is confirmed at checkout.
