This listing is for ONE BRAND NEW Nichia NUBM08 445nm 4.75W+ Watt 9mm Laser Diode. The diodes are meticulously extracted from a new laser diode array.
 
You must know what you are doing before hooking these up. Reverse polarity, excessive current and high heat will damage or ruin these. A proper CONSTANT CURRENT laser diode driver is required to drive the diode. The current should not exceed 4 amps!!! The diodes must be inserted in to a laser diode module before energizing to dissipate heat. The G-Ball lens should not be removed. Be sure no dust, residue or other material is obstructing the diode window. Each diode is tested for functionality before shipping. 
 
Always wear protective safety glasses or goggles that block this spectrum and intensity of light... You've only got one set of eyes!!!