Koyo Hashimoto Signature Model ＜Yo-Yo Spec＞ Body Material : A7075 Wing Material : POM Spacer Material : SUS Diameter : 68.5 mm Width : 68.6 mm Weight : 78.4 g Axle : M4×15 mm Bearing : size C (Flat) Pad : Slim (OD 19 mm)