YoyoRanger ReX Material : Aluminum (6061) Weight(g): 65.6 Width(mm): 43.2 Diameter(mm): 56.2 Bearing Gap(mm) : 4.4 Bearing Size (Inside x Outside x Width): .250 x .500 x .187 in Type C - Centrac Bearing Stock Response System: Pad Large Slim Style : 1A, 3A, 5A