finishing BPF Series Button Plugs with Flush-Type Heads BPF Series 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. * Easily snap into place * Held in place by a bead until deliberately removed Material: Low-Density Polyethylene Color: Black 142 * For other material and color options, contact customer service.