Nichia Ndb7k75 / Ndb7k75t Φ9mm Blue 450nm 3.5w-5w Laser Diode For Laser Modules (soldered)) - Stage Lighting Effect - AliExpress
Mini Homemade 3.5W Laser Engraving Machine with Grbl Control for Wood and Plastic DIY Engraving and Cutting - China CNC Laser Engraving Machine, Laser Engraver Machine | Made-in-China.com
445 nm Laser Diode, 3.5W Power
Amazon.com: OXLasers 3.5W 450nm Focusable Blue Laser Module for DIY CNC Engraving Cutting Machine with PWM for CNC 3018 (3.5W) : Arts, Crafts & Sewing