This is an individual with vibrations that do not affect play. There is also uneven coloring on the rim. Due to the nature of B-grade, we cannot accept returns or refunds. This is an expensive item, so if you are even slightly concerned about the B-grade, please refrain from purchasing. Since the way vibrations are felt differs from person to person, we cannot reply to your inquiry. Please purchase only if you understand everything. JAPAN TECHNOLOGY × SOMETHING Collaboration KAGEROU ＜YoYo Spec＞ Body Material：A6061 Rim Material：Stainless steel Diameter：56.8mm Width：46.2mm Weight：65.4g Axle：M4×8mm Bearing：size C (Curved) Pad：Slim (OD 19mm)