CNCOLETECH CO2 Laser Lens Dia:15mm FL:2 or 50.8mm Laser Mirror CVD ZnSe Focus Focal Lens for CO2 Laser Engraving Cutting Engraver/Cutter 40W-200W

Works great with BOSS lasers.

Would have given it 5 stars but it filters out red laser pointer, other than that it seems to be doing ok.

Good

good quality

used these 4 100s of hours on a 50 wt , work great

Great for big laser machine

This was a great replacement Focus lens for my 40 watt unit. I would buy it again

Confezionamento top. Lenti OK!!!

If you have a K40(Chinese) laser cutter and happen to crack your focal lens, thats a good and quick replacement. The quality is the same as the original lens that came out of the box.

Identical to the name brand one for my laser, at a fraction of the cost.