3.0 inch Flush Mount Black Plastic Body and Sheet Metal Hole Plug Qty 5 by Caplugs Button plugs with flush-type heads can be used for plugging holes in equipment made of sheet metal, such as automobile bodies, tanks, refrigeration units, etc. Can be snapped into holes easily Held in place by a bead until deliberately removed Material: Low-density polyethylene Service Temperature: LDPE: -94 - 175° F (-70 - 79° C) Color: Black