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

Replaced original lens in 40w laser cutter and was able to use less power to cut through wood.

12mm lense is head and shoulders above the one that came in my k40.

Tutto OK, Amazon sempre una garanzia

k40 lasted 2 hours crap

Muy buena calidad precio ,la mejor elección recomendado

Great for big laser machine