What is this?Silicone Rubber Tapered Plug is designed to protect holes or threads during a powder coating process or other projects, use for powder coating, painting, plating, anodizing, sandblasting, etc.What will I get?The tapered plug is in size of: Bottom Diameter: 5mm / 13/64 inch; Top Diameter: 9mm / 23/64 inch; Height: 25mm / 0.98 inch; In the package of: 15 x Silicone Rubber Tapered PlugAre there any advantages of the product?Made of silicone rubber, good resistance to chemicals, acid and alkali resistance, strong adsorption capacity and good aging resistance, can withstand high temperature up to 600 degrees Fahrenheit (315 Celsius) in a short time.Conical design, solid, easy to install and good sealing performance, flexible and durable, not easy to crack, shrink, harden or break. What should I notice?Please check the size carefully before ordering!