Wheel Axle Spacer Kit I.D. 25mm - O.D. 1-1/2" (1.50) - 13 Spacers Machined 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.