450nm 7W 7000mW Blue Laser DIY Engraving Machine Head CNC Laser Module PWM - AliExpress
Amazon.com: APAAZO Twotrees CNC Laser Engraving Machine Laser Head 7000mw/20W Compatible with DIY Carving Machine Engraver Part Laser Module Head for TT-5.5S (Color : 7500mW with Glasses)