The laser and fan extension cables allows for longer distances from the laser driver to the laser. If you machine is large and you don’t want to mount the driver on the gantry, then these cables will allow for longer distances between the driver and the laser. This distance adds to the already 3′ laser cable that comes standard.
Laser Cable is 18 AWG with Molex Mini fit Jr. connectors on each side.
Fan Cable is 22 AWG with JST connectors on each side.
Lengths are 5′, 10′, 15′, and 20′.
On larger machines like the Shapeoko3 XXL, you can have the laser driver on the side with the electronics and run the longer laser cable to the laser on the gantry without the need to mount the driver on the gantry.