Description: 10 Pieces 17-22mm Rubber Stopper Lab Tapered Plugs for 20mm Flask Test Tubes Designed in tapered shape with standard demension, easy to plug in or pull out, creating an airtight seal in the mouth of your carboy or fermenter Smooth and tapered sides designed for exceptional sealing and optimal fit with a wide range of openings Well made with sturdy rubber stoppers to provide the best primary and fermenter arrangements possible, ideal for laboratory, household, and industrial use Top Diameter: 22mm / 0.87inch; Bottom Diameter: 17mm / 0.67inch; Length: 35mm / 1.38inch Specification: Material: Rubber Color: White Package Includes: 10 Pieces Test Tube Rubber Stopper
