BPFE 19MM, 3/4" 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. These plugs will fit into holes sized 0.728" - 0.787" OR18.50MM - 20.00MM in material thickness 0.031" - 0.079" OR 0.80 - 2.00MM One size plug fits a variety of different sized holes. Quick and easy installation and removal. Common applications include car bodies, tanks, appliances, and machinery. Manufactured in flexible Santoprene. Material: FlexTemp (Thermoplastic Rubber) Color: Black