Focus preset at 80mm with a 20 degree line generating optic. This can be changed using a .035 Allen wrench to free the line gen optic and loosen the focus lock. The collimating lens can then be rotated with a spanner or needle nose to change the laser focus. Lock the lens with the set screw and re-attach the line gen optic, center it and lock it down.
Your bid is for the laser module only. The mount in the first picture is not included.
Specifications:
Model number: SNF-501L-650-5-20-K
Part number: 920-021873 Rev AB
Input Voltage: 5 to 6 VDC
Input current: 34 mA
Output power: 3.5 mW
Wavelength: 654 nm RED
Focus distance: 80 mm (factory set, but can be changed)
Fan angle: 20 degrees
Module length: 83 mm
Module diameter: 19 mm
Cable length: 305 mm