CO2 Laser Mechanical Parts Metal Components for DIY CO2 Laser Engraving Cutting Machine,SPT 300W CO2 laser tube,Amazon.com: Cloudray Metal CO2 Laser Tube For CO2 Laser Engraver Marking Machine (30W CR30C) : Arts, Crafts & Sewing,Amazon.com: TEN-HIGH CO2 Glass Laser Tube, Unique Upgraded Version Super Easy Installation Stable Power, for Laser Engraving Cutting Machine, Length ,Amazon.com: Cloudray Metal CO2 Laser Tube For CO2 Laser Engraver Marking Machine (30W CR30C) : Arts, Crafts & Sewing