These are new metal Chevy Nova dash hole cups (2 pcs) to fit 30mm dash holes or used to repair too large of a dash hole for a shafted radio. The overall diameter is 40 mm and the rear portion is 30mm. This will help solve a lot of problems for those of you seeking a way to fill the shaft holes in your dash.

Here's what they look like (slideshow:): http://flickr.com/photos/cntstpdrmn/sets/72157614440948255/show/

Here are the cups:



Here is what they look like installed:



Here is what they look like installed without the knobs mounted: