These soft rubber grommets are great for passing wiring or small tubes through sheet metal holes. They line the inside of the hole to prevent the sharp sheet metal from abrading the wires or tubes. 

They are ideal in metal-framed trailers (like Airstreams, Spartans and Avions) inside the walls for passing wires through framing (ribs) or through belly pans.  Just drill a 1" hole through the sheet metal and insert the grommet.  It will stay in place securely. They can go through material up to .0625...somewhat thicker than a typical sheet of aluminum used in trailers. You can than insert a bunch of 12v wires or a tube up to .75" OD through the grommet.

Please note that the price drops to 19 cents when you order 25 or more; and to 14 cents when you order 100 or more.

• Inner Opening = .75"
• Use drill size = 1"
• Overall Diameter = 1.25"
• Panel thickness = .0625