Amazon.com: Cloudray K Series Whole Set Incl Head and Mirror Mounts Wth Focus Lens D12 FL50.8 Mo Mirrors for 2030 4060 k40 Laser Engraving Cutting Machine
POWGE K40 CO2 laser engraving machine 20 teeth 2GT idler Pulley Bore 8mm Bearing 608ZZ 1220-2GT-6 belt bed levelling Motion kit - AliExpress
K40 Motorized Z axis | Details | Hackaday.io
POWGE K40 CO2 laser engraving machine 20 teeth 2GT idler Pulley Bore 8mm Bearing 608ZZ 1220-2GT-6 belt bed levelling Motion kit - AliExpress