Wheel Axle Spacer Kit I.D. 3/4" (0.75) - O.D. 1-1/4" (1.25) - 13 Spacers Machined Finish Made in the U.S.A. from domestic material - very high quality. CNC machined All parts are road tested and quality assurance approved. Speed Dealer is your #1 source for builder parts on the web. Solid T6061-A aerospace grade aluminum.