Amazon.com: CNC 24V blue laser module for laser engraving and cutting machine 24V with PWM/TTL can cut 3mm balsa wood can engrave stainless steel (40×40×70mm) : Arts, Crafts & Sewing
Amazon.com: Adjustable CNC Laser Head Module, 80mm / 3.1in Stroke, for Laser Engraving Machine : Arts, Crafts & Sewing
OXLasers 2.5W 3.5W 5.5W 450nm Blue Laser Modules for CNC Engraving and Cutting Laser Head with PWM
Upgrade CNC Laser with Opt Lasers' PLH3D-XT-50 & LaserDock Kit