Check the listing for details. Osram PL520B 80mW 520nm Laser Diode in Copper Module W/Leads. Condition: New. Listed at 55.00 USD. 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. Osram PL520B 520nm Laser Diode *Disclamer* By purchasing these diodes you are agreeing to the following. - You are over 18 years of age . - You understand that these components that are mentioned above are dangerous when not properly assembled into a finished product. - You will use these as components and properly incorporate them into a finished product. - You will use these diodes/modules in a safe and responsible manner and for a legal purpose. - You are legally responsible for the use of these components, improper use of these components or their end products. - You are legally responsible for any injury to anybody resulting from the use of or assembly of these components or their finished products. - You Accept this diode/module as a COMPONENT for integration in a system of YOUR OWN design and will be legally responsible from any and all LIABILITIES These Diodes and Modules are sold solely as a component for incorporation into the customer's end products. Therefore, this diode/module is exempt from compliance with the appropriate requirements of FDA 21CFR, section 1040.10 and 1040.11 for complete products.