TOP SECRET PDR 50 Piece Flush Mount Black Hole Plug Assortment for Auto Body and Sheet Metal Plugs. 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. 50 Pieces total (10) 1/4" and (5) each of the following sizes. 3/8", 1/2",3/4", 1", 1 1/14", 1 1/2", 1 3/4", 2", Can be snapped into holes easily Held in place by a bead until deliberately removed Material: Low-density polyethylene (BPF-5mm, BPF-6mm, BPF-1/4-4 and BPF-11/32 is EVA material) Service Temperature: LDPE: -94 - 175° F (-70 - 79° C) | EVA: -90 - 140° F (-68 - 60° C) Color: Black