650nm red line laser module industrial laser group module adjustable focal length The housing is provided with an insulator (cross-2packs) - Amazon.com
650nm red line laser module,Industrial Laser Group Module adjustable focal length line cross point (line-4pack) - Amazon.com
Tegg 10 PCS Mini 650nm 6mm 5mW Red Laser Dot Diode Module Copper Head 3.3V: Amazon.com: Industrial & Scientific
Red Line Laser 650nm Diode Module Adjustable Beam Level Marking Positioning 5V Adapter Holder - Amazon.com