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
15Watt Focusable Blue Laser Module Head 15000mW For Engraving – Zeus Lasers
i2R CNC Laser Upgrade Kit with PLH3D-15W Engraving Laser Head | eBay