What is this?Silicone Rubber Tapered Plug is designed to protect holes or threads during a powder coating process or other projects, used for powder coating, painting, plating, anodizing, sandblasting, etc, also can be used to seal bottles flasks in the laboratory or home, etc.What will I get?The tapered plug is in size of: Bottom Diameter:30mm / 1.18 inch; Top Diameter:37mm / 1.46 inch; Height: 30mm / 1.18 inch; In the package of: 4 x Silicone Rubber Tapered PlugAre there any advantages of the product?Made of silicone rubber, good resistance to chemicals, can withstand high temperatures up to 600 degrees Fahrenheit (315 Celsius) in a short time. How to use it?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!