3/4" 0.75 inch Black Rubber Plugs for Flush Mount Body and Sheet Metal Holes Qty 10 (Pack of 10) 3/4" 0.75 inch Black Rubber Caplugs for Flush Mount Body and Sheet Metal Holes. Made of PliableThermoplastic Rubber - Ergonomic Button Plugs with Flush-Type Heads. * One size plug fits a variety of different sized holes Quick and easy installation and removal Manufactured in flexible Santoprene * Caplugs BPFE Series Ergonomic Button Plugs with flush-type heads are designed primarily to plug holes in sheet metal. The BPFE plugs offers greater versatility because of the pliable nature of the material.