Laser Level Self Leveling, Elikliv Base Fine-tuning Laser Level, 200ft Outdoor Rugged 4D Green Cross Line Professional Laser for Construction and Picture Hanging, Class: Class 2,<1mW power output - Amazon.com
Class Ⅱ 6mm 520nm 1mw Small Size Green Laser Module Point Laser Module Class II Safety Laser - Amazon.com
532MD-30 532nm 1mW 4.2-5VDC Green Laser Dot Diode Module with TTL Class 2: Amazon.com: Industrial & Scientific
FDA Class II 1mW Green Laser Pointer | Z-Bolt® BTG-3