Amazon.com: Cloudray Mechanical Parts Set Inner Sliding Rails 500300mm for DIY CO2 Laser Engraving Cutting Machine
Visable laser tube with red pointer for DIY laser engraving machine TR45 40w laser tube with red light alignment assistance|Carbon Dioxide Lasers| - AliExpress
China Outer Sliding Complete Mechanical Kits Xy Stage for DIY Laser Cutter with Laser Tube Holder - China Laser Spare Parts, Laser Cut Parts
DIY CO2 Laser – Using Exhaled Air! at Buildlog.Net Blog