650nm 660nm Adjusted Red Laser Line Dot Cross Laser Diode Module 3V-5.5V 100mW Laser Dot/Line/Cross Module Focusable 13mmx42mm with US Power Adapter and Heatsink: Amazon.com: Industrial & Scientific
Amazon.com: 130W Laser Engraver Module,20W Optical Power Diode Laser Module Kit for Engraver Cutter,Laser Engraving for Wood and Metal,Fixed-Focus Laser for Acrylic/Wood Cutting,Support Air Assist Laser Cutting