Rubber Bumper; Rubber Doughnut. 2-1/2 inch O.D. x 1 inch I.D. x 1-3/4 inch Thick Price is Each. Rubber Bumper; Rubber Doughnut. 2-1/2 inch O.D. x 1 inch I.D. x 1-3/4 inch Thick Price is Each.  Ref: P480B