What is this?The Silicone Rubber Tapered Plug is great for laboratory utensils such as flasks, test tubes, or other laboratory applications, also can as a sewer plug, water pipe plug, or drain plug, with a handle on the top for easy installation and removal, a smooth surface, and rust resistant ensures long time use.What will I get?The tapered plug is in size of: Bottom Diameter: 14mm / 0.55 inch; Top Diameter: 19mm / 0.75 inch; Height: 26mm / 1.02 inch; In the package of: 1 x Silicone Rubber Tapered PlugAre there any advantages of the product?Made of Silicone Rubber, with good resistance to chemicals, acid and alkali resistance, can withstand high temperatures 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!