DTOL 10 X Mini Laser Dot Diode Module Head WL Red 650nm 6mm 5V 5mW Pack of 10
Material: Copper Plastic. Laser Shape: Dot. Outer diameter: 6 mm. Wavelength: 650nm. Working Voltage: 5v. Operating Current: must less than 20 Ma. Can be used to connect diode tubes for multiple use