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Aftermarket seal ring for the protective lens drawer of Ospri handheld welding guns. The seal holds the 20 x 3 mm protective lens flat and stops fume and shielding gas getting past it to the focusing lens.
21 x 15 x 3 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 | 21 x 15 x 3 mm (OD x ID x T) |
| Material | PTFE with stainless steel spring |
| Protective Lens | 20 x 3 mm |
| Fits | Ospri 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) |
|---|---|---|---|
| Ospri, 21 x 15 x 3 mm (20 x 3 lens) | 21 x 15 x 3 mm | Ospri handheld | SPM-LAS-2184 |
| Gun | Fits |
|---|---|
| SUP, 21 x 15 x 2.7 mm (18 x 2 lens) | SUP20S, SUP20T, SUP21T, SUP23S, SUP23T, SW150 |
| Qilin, 20.5 x 16 x 2.5 mm (20 x 2 lens) | Qilin handheld |
| WSX, 20.5 x 16 x 2.4 mm (18 x 2 lens) | WSX 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.
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It fits Ospri handheld welding guns with the 20 x 3 mm protective lens. Measure the old seal: it should be 21 x 15 x 3 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.
Orders typically require 1 to 5 business days for processing. During this time, we confirm product availability and prepare the shipment for consolidation.
We offer two shipping tiers. The exact cost and transit time for every option are quoted live at checkout, and you can also check them from the cart page before you buy.
Express (DHL, UPS, EMS)
For urgent needs. Transit is typically 3 to 8 business days after dispatch, depending on destination.
Economy (air cargo and special lines)
Our standard, cost-effective option. Transit is typically 5 to 15 business days after dispatch.
Shipping costs are calculated at checkout based on your location and selected shipping method.
Once your order ships, you'll receive a tracking number via email so you can monitor your delivery.
For detailed delivery information and FAQs, please visit our Delivery Information page or contact us.

