About this 3D model

A general purpose plug to fill a 11-12mm hole (quite snug in 11mm, good fit in 11.5mm. OD of the ridge on the fingers should be 12mm but printer resolution on FDM tends to flatten the rounded edge down to about 11.8. Diameter of the cap is 15mm, 2mm thick. This is a perfect fit for the hole on a Saab 99 instrument panel opposite the one for the clock adjustment.