Glued Laser Crystal KTP+YVO4 w/Copper Holder for Green Laser 500mw LD Pumped: Amazon.com: Industrial & Scientific
High Power Adjusted 405nm 500mw Violet Blue Diode Laser Dot Module 12V /22x90mm + Adapter: Amazon.com: Industrial & Scientific
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
Blue Laser Module 405nm/450nm 500mW/2.5W/5.5W/10W/15W Focusable for 3D Printer/CNC Engraving/Laser Engraving (2500v1), Line Lasers - Amazon Canada