7071 Aluminum and 3056 steel axles provide performance that is tried and true. Tapered hanger ends and oversized axles allow for better bearing performance. This is where we began and our evolution will continue with the Classic model line that delivers unmatched turn and grind performance at a price point all can enjoy. • Top Bushing: 12mm tall | 91a hardness • Bottom Bushing: Bottom 14mm tall | 86a hardness • Machine-faced hanger ends for precise bearing contact. Size Chart: 00 - 6.5" - Fits 6.5" & Under 11 - 7.25" - Fits 7.0" - 7.5" 22 - 7.6" - Fits 7.5" - 7.875" 33 - 8.0" Axle - Fits 7.875" - 8.25" 44 - 8.35" Axle - Fits 8.25" - 8.75" 55 - 9.0" Axle - Fits 8.75" - 9.125" 66 - 9.35" Axle - Fits 9.125" - 9.75" Weight: 00 - 332.5g 11 - 344g 22 - 351.5g 33 - 367.5g 44 - 396.5g 55 - 412g 66 - 419.5g