The 40pcs TIG gas lens kit is an accessory set for WP-9, WP-20 and WP-25 style TIG torches. Per the listing it includes gas lens collet bodies and glass cups in sizes #4 through #12, so you can change cup size for tight corners or wider gas coverage. It is a good buy if your torch is in those series and you want spares. Skip it if you use a different torch family. This review is based on the Amazon listing, not hands-on testing.
40pcs TIG Gas Lens Kit at a Glance
| Item | Per the listing |
|---|---|
| Kit count | 40 pieces |
| Torch compatibility | WP-9, WP-20 and WP-25 style torches |
| Cups | Glass cups, sizes #4 to #12 |
| Other parts | Gas lens collet bodies and related accessories; check the listing for the exact breakdown |
| Main purpose | Smoother shielding gas flow and more cup choices |
| Brand, warranty, materials | Not verified; check the listing |
What a Gas Lens Does
A gas lens replaces the standard collet body with one that has a fine screen. The screen straightens the shielding gas into a smoother column, so you get better coverage with the same flow rate. That also lets you extend the tungsten further for better joint access.
It helps on stainless and aluminum, where poor shielding shows up as discoloration or contamination. It will not fix dirty metal, wrong polarity or bad gas.
Who This Kit Suits
- TIG welders with a WP-9, WP-20 or WP-25 torch who want a spread of cup sizes.
- Shops that want spare cups and collet bodies on the bench.
- Welders who like to see the tungsten and puddle through a clear cup.
It is less suited to anyone with a WP-17, WP-18, WP-26 or proprietary torch, or anyone who needs certified OEM parts. Only the WP-9, WP-20 and WP-25 fit is stated.
How to Check Fit Before You Order
- Identify your torch series. Look at the markings on the torch body or the manual.
- Match the collet size. Gas lens bodies and collets must match your tungsten diameter.
- Pick the cup size. Smaller cups reach into tight corners. Larger cups give broader coverage when the joint has room.
- Test fit cold. Seat each part by hand before you weld. A loose or crooked part leaks gas.
- Do not overtighten. Glass cups can crack if forced.
Pros and Limitations
Pros
- Wide range of cup sizes from #4 to #12.
- Gas lens bodies for smoother gas flow.
- Glass cups let you see the tungsten and puddle.
- Handy as a bench supply of consumables.
Limitations
- Fit is stated only for WP-9, WP-20 and WP-25 torches.
- Glass cups chip or break if dropped or overtightened.
- Brand, warranty and materials are not verified.
- If you only need one cup size, a smaller pack is simpler.
Safety Notes
- Let the torch cool before changing cups or collet bodies.
- Replace chipped or cracked glass cups before welding.
- Wear proper welding PPE, including a helmet with the right shade, and follow your welder manual.
Related guides: RIVERWELD TIG glass cups, 36pcs TIG torch accessories kit and the Shimeyao TIG torch kit with 53 consumables.
Frequently Asked Questions
Which torches does the 40pcs TIG gas lens kit fit?
The listing states WP-9, WP-20 and WP-25 style torches. Check your torch series and collet size before ordering, especially if you use a WP-17, WP-18, WP-26 or a proprietary torch.
What cup sizes are included?
The listing names glass cups from #4 to #12. Check the product page for how many of each size are in the 40-piece count.
Is a gas lens worth it for aluminum and stainless?
It can help, because the smoother gas flow gives better coverage and lets you extend the tungsten. You still need clean metal, the right tungsten and AC or DC settings for the material.
Are glass cups fragile?
Yes. Glass cups can chip or crack if dropped, overtightened or hit by rough handling. Inspect them before use and keep spares.
Conclusion
This kit is a practical spares set for WP-9, WP-20 and WP-25 torches. Confirm your torch series first, handle the glass cups with care, and buy a different set if your torch is outside those series.
