445nm, 3.5W HHL Multimode Laser Diode by Wavespectrum
Amazon.com: Laser Engraving Machine 3.5w Laser Cutter 100cm x 100cm Big Area Laser Cutting Machine Wood Laser Machine TTL PMW grbl Controller (100cm 3.5w) : Arts, Crafts & Sewing
Blue Dot 450nm 3500mW Focusable 3.5W Laser Diode Module Driver 12V w/ TTL Fan | eBay
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
448nm, 3500mW Multi Transverse Mode Laser Diode by Nichia