Description Korky 480BP Tank-To-Bowl Dry Gasket (4.1 inch x 3.0 inch) (107mm x 76mm) 107mm x 76mm 4.1 inch Outer Diameter x 3.0 inch Inner Diameter 3.7 inch (94mm) Inner Lip 1.1 in or 28mm Tall Fits most two piece toilets with 3 inch flush holes (excluding Kohler) Sits between toilet tank and base to protect porcelain Fits Flush Valve. FLUSH VALVE NOT INCLUDED