[RWebb]

I'm looking for something to fill a large hole in sheet metal but with a small hole in the middle of it.

I'd like something that looks like a rubber grommet around the outside, with an OD of ~ 1" (i.e. the hole in the sheet metal I want to fill is 1" dia.)

but thru the center of it I want to run a tube 1/4" in dia. (or I could cut a hole that size if the thing is solid)

this is for an electrical wiring run I'm doing in a VW Vanagon - I had to drill 1" holes so I could get polyethylene tubing run (it protects the actual 12 Ga. wire from harm, shorting etc.)

so, what are these things called and where (what type of store) would carry an assortment of them?

thanks!