Rubber Doughnut Rubber Bumper. 2-1/2 inch O.D. x 1-1/4 inch I.D. x 3/4 inch Thick Rubber Doughnut Rubber Bumper. 2-1/2 inch O.D. x 1-1/4 inch I.D. x 3/4 inch Thick  Ref: P480A114