Description Silicone Toilet Flush Valve Seal 2-3/16-inch (55mm) Outside Diameter 14/16-inch (22 mm) Inside Diameter 1-7/16-inch (37 mm) Inside Lip Diameter 2 11/16-inch (54mm) Outside Lip Diameter Has a small lip on the outside to ensure a tight seal on to your flush valve Measure your seal before purchasing! This seal is used for toilet flapper and flush valve to create a leak-free seal