High-quality materials: Each valve membrane seal is made of high-quality rubber and plastic, which has reliable performance, is not easy to deform, tear and break, and has a long service life of these seals is smooth, no; you have to worry about scratching your fingers. Easy to use: disconnect the water supply to the tank and rinse the tank, then unscrew the large plastic cap, remove the membrane seal from this cap and replace it with a new one, you will see a vertical plastic line on the back; of the seal and align it with the gap of the cap; tighten the cap making sure the float on the arm is in a horizontal position, restore the water supply and install. Dimensions: OD: 27mm, ID: 23mm, Depth: 15mm, The tank side inlet membrane seal replaces the rubber membrane seal. Universal Valve Diaphragm Seals: These side inlet membrane seals fit most side inlet valves and bottom inlet valves, they can easily and effectively repair a tank that is not working, saving you time and effort. Easy to