5.5W 445nm Blue Laser Module Laser Engraving And Cutting TTL Module 5500mw 3mm | eBay
5.5w High Power 445NM Focusing Blue Laser Module Engraving And Cutting TTL 5500mw Laser machine diode|module laser|engraving laser modulegoogle google - AliExpress
Laserland Blue 450nm 5.5w Laser module for engraving/marking/cutting w/ PWM/TTL focusable
Laserland Blue 450nm 5.5w Laser module for engraving/marking/cutting w/ PWM/TTL focusable
500MW 2.5W 5.5W 15W 450nm Focusing Blue Laser Module Laser Engraving And Cutting TTL Module Can Engrave On Some Metals