General description Upgrade your 1/10 RC car with this comprehensive 80-piece ball bearing kit, specifically designed for TT02, TT-02, TT02D, and TT-02D models. Made from durable steel, these ball bearings enhance the performance and longevity of your RC car. Technical specifications Material: Steel Package Contents: 20 x Ball Bearing (5x11x4mm) 20 x Ball Bearing (8x12x3.5mm) 40 x Ball Bearing (5x10x4mm) Measurement allowed error: +/- 1-3cm