20mm diameter ZnSe meniscus 50.8mm or 2" inch Focal Lenth lens
This lens is suitable for most CO2 laser cutters with a 20mm OD lens housing. It provides a Focal Length of 50.8mm or 2" inch.
Just Add Sharks Ltd Blacknose A3 40W & 30W, Greyfin A2 60W Laser Cutters
Most low-cost Chinese made CO2 laser cutters and engravers of 30W - 60W.