Spool Bush

For those who are not yet drawing things and would like an insert for their spool holder to help it roll better. Simple designed collar insert for many 3d printers with a small radius spool holder.
Yes I know its very uncomplicated but hey! lets see if anyone downloads it.
The photo is of an Ender spool holder, the bush sits inside the lip to prevent the spool rolling off.
Outside diameter 50mm
Inside diameter 40mm
Shaft length 80mm