Filament brackets for attaching to a shelf with rollers that can fit any size reel. Install 608 bearings in the brackets, place filament guides on 1/2 inch pvc pipe, and attach with m5 screws and washers. .stl file includes everything that needs to be printed. .f3d file is a fusion 360 file depicting it fully assembled. Filament reels sit on top of the guides instead of anything going through the hole in the reel, so reels are easy to swap.