Listing is for a single Osram PL520B 120mW 520nm laser diode in a standard 12mm copper module with leads. The copper module upgrade provides a huge improvement in thermal conductivity over the standard brass module for moving the heat away from the diode to your heatsink which gives a much more stable output from the diode.
Save yourself the headache of extracting, pressing and soldering on your diode. Just add host, heatsink and driver. The current must be limited to no more than 300mA to the diode.
Don't attempt to connect the diode directly to a fixed voltage source like a battery. The diode requires a proper laser driver to operate.
For drop in ready
units that have the diode in modules with the driver installed and glass lens see my other PL520B listings.