What is this?The Rubber Tapered Plug is great for laboratory utensils such as flasks, test tubes, or other laboratory applications..What will I get?The tapered plug is in size of: Bottom Diameter: 10mm / 0.39 inch; Top Diameter: 15mm / 0.59 inch; Height: 25mm / 0.98 inch; Hole Diameter: 3mm / 0.12 inch; In the package of: 20 x Rubber Tapered PlugAre there any advantages of the product?Made of Rubber, with good resistance to chemicals, acid and alkali resistance, can withstand high temperatures in a short time.There is a hole in the center of the plug for inserting a glass tube, very convenient for meeting your needs.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! This product has a smell, please put it in a ventilated place before use to reduce this smell
