Descriptions:Made of silicone rubber, good resistance to chemicals, can withstand high temperature up to 600 degrees Fahrenheit (315 Celsius) in a short timeConical design, solid, easy to install and good sealing performance, flexible and durable, not easy to crack, shrink, harden or break.Designed to protect holes or threads during a powder coating process or other projects, use for powder coating, painting, plating, anodizing, sandblasting, etc.Specifications:Material: Silicone RubberColor: WhiteBottom Diameter: 5mm / 13/64"Top Diameter: 9mm / 23/64"Height: 16mm / 0.63"Package Contents:15 x Silicone Rubber Tapered Plug.
eBay