Side spool mount for the Bambu Lab printer. No need to screw from the back. Mounts easily on the side with velcro. If you're worried its not strong enough to hold a kilo of filament with Velcro, I tested it by doing a pull up off the side. Those pictures aren't included. Maybe for an extra price. I printed mine with ASA / 3 top / 3 bottom / 5 wall loops to strengthen the PTFE coupler / 15% grid infill. Threads for a PC4-M10 connector. Used #6-32 X ½" screws with a lock washer to mount the bracket that came with the printer. Hex hole in the back for the nut to sit flush. Works great. Let me know how it works for you!