Oatey 7203 Dearborn Brass 1-1/2 in. Regular Slip Washer, Rubber 1-1/2 in. I.D. x 1-3/4 in. O.D., 3/16 in. thick Rubber slip washer Dimensions are 1-1/2" I.D. x 1-3/4" O.D Thickness of 3/16"