This is a vacuum adapter for a Makita 9924DB Belt Sander to suit a vacuum with 35mm O.D. nozzle. Prints fine in both PLA and ABS at 0.15mm resolution. Adapter slides on from top of sander and is offset to one side to allow clearance for your hand.
I printed this in PLA but ABS should work also. Support IS REQUIRED and light sanding of the adapter makes it a much better fit with the sander outlet.