20mm Gromet

I made this for a wood work project and is glued in, not High Tech, just thought I would share it.

For a 20mm Hole
20mm insert
large O/D 30mm
I/D 13.5mm
2.3mm thick

If you remix this or make alterations, please upload them back with all original solid works files so that everyone can use them, and people that don't have solid works can then benefit from the modifications,
Thanx

I Always add the original creation file not just the stl, so if people want to play with the design they can