LASCO 02-3075 Flush Valve Seal for Kohler OEM 83888, 3 3/4-Inch x 2 3/16-Inch x 3/4-Inch Kohler rubber flush valve seal washer 3-3/4 x 2-3/16 x 3/4 Fits Kohler flush valve Replace worn leaking washer Original equipment manufacturer number 83088 replacement Replacement toilet repair part