Friction-fit filament filter

This is a customizable friction-fit filament filter. If it's too tight, sand or increase tolerance. If it's too loose, put some electrical tape on the inner portion, or decrease tolerance. The slit is you can put it on or take it off without unloading the filament, but if you don't want a slit, just set the slit size to zero. No supports needed, super easy to print.