QWORK® White Solid Rubber Bung, Tapered Stopper Sealing Plug for Lab, 9# ( 45x37x30mm), 4 PCS

High Quality: Made of high-quality environmentally friendly rubber, the stoppers have great sealing, chemical resistance and not easy to deform, ideal for laboratory. Application: The solid rubber stoppers can be used to block glass ports, flask, test tube or other laboratory applications etc. Ideal for laboratory, household, medicine, scientific research, industrial application etc. It also can be punched for connecting glass tube. Size: 9#, 45mm×37mm (1-3/4” x 1-7/16”), 30mm (1-3/16”) height Package Content: Including 4 white solid rubber stoppers (same size)