TEN-HIGH Reflective Lens CO2 Laser Lens Laser Mirror K9 Gold-Plated Glass Mirrors, for CO2 Laser Engraving Cutting Machine, Dia 20mm 3PCS

Bought a k40 at auction, didn't really know what to expect. One of the mirrors shattered (!) because it wasn't in great shape when I got it (must have taken too much heat). Couldn't cut through Luan before, 10mm/s 5 passes, just charred and never separated. These mirrors, same speed, one pass, all the way through. I don't know how it compares to stock mirrors in good shape, but they definitely get the job done now!

actually the mirrors are working ok. But i got burned so bad on their cloudy lens I will never give them a good rating.

Works great and packaged great

Easy installation and I used it for my laser cutter

Wow, what a difference over the stock mirrors in my K40 laser cutter. Perfect fit as well.

Odered these and installed in my k40 machine. Did a test fire about 5 times and 2nd lens cracked into 3 pieces. 1 lense had divit marks in middle of lens. Ordered gold plated but I dont think these are gold played

Broke 2 in 2 weeks stock ones that came with my laser lasted over 2 years

These mirrors have been in my K40 for less than 2 weeks, and a week of that I was out of state and the machine sat unused. I ran a couple of patterns this evening and noticed that Mirror 3 was glowing bright yellow and beginning to smoke. Upon further inspection I found that the mirror and cracked. This is a stock K40 and this is the results. I hope this is not the quality that everyone receives, if so you better pay close attention to your machine.