i have a 6x laser that's in a Coleman/Max light and it takes 2 cr batteries (included)...the laser has a custom heatsink made by me with a set screw to hold the module in place...the 6x diode is on a rkcstr driver at 190ma and im using a plastic lens and the hold laser measures out to be 104.00mm im asking 175.00 shipped OBO any where beam shot will be added later tonight