Description Toilet Flush Valve Gasket (3.3 inch x 2.3 inch) (84mm x 58mm) 84mm x 58mm 3.3 inch Outer Diameter x 2.3 inch Inner Diameter 2.85 inch (72mm) Inner Lip 2.5 inch (63.5mm) Second Inner Lip 1 inch or 25mm Tall Fits two piece toilets. Sits between toilet tank and base to protect porcelain. Fits Flush Valve. FLUSH VALVE NOT INCLUDED