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"; Top Diameter: 9mm / 23/64"; Height: 25mm / 0.98"; In the package of: 15 x Silicone Rubber Tapered PlugAre there any advantages of the product?Made of silicone rubber, good resistance to chemicals, 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!