450nm 15W Laser Module Laser Cutter Adjustable Focus with TTL/PWM or CNC engraving machine - BeamQus
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 (33×33×70mm) : Arts, Crafts & Sewing
DC 15W 450nm Blu-ray Laser Head Engraving Module TTL Wood Marking Cutting Tool | eBay