Features: Yoyo replacement accessories include 2 responsive yoyo bearings with 2 short axles, 4 unresponsive yoyo bearings with 4 long axles, 6 yoyo strings, 1 bearing remover, 4 replacement rings. Made of stainless steel, corrosion-resistant and durable. High precision bearings for smooth, quiet spinning. Bearing remover with a split ring for easy attaching to your keychain or backpack. Great replacement pack for your yoyo ball. Specifications: Material: Stainless steel Bearing Removal Tool: 68 * 6.9mm Unresponsive: Bearing: 6.35 * 12.7 * 4.762mm Bearing Ball: 10 balls Axle: M4 * 10mm Responsive: Bearing: 6.35 * 12.7 * 3.17mm Bearing Ball: 8 balls Axle: M4 * 8mm Package List: 1 * Bearing Removal Tool 2 * Responsive Bearing 2 * M4x8mm Screw for Responsive Bearings 4 * Unresponsive Bearings 4 * M4x10mm Screw for Unresponsive Bearings 4 * Replacement Ring 6 * String