and durable. Make of immoderate Bearing Steel,Deep Groove .. Widespread bearing,economic and standard. Less Friction, Higher Speeds and Durability. Special no contact dual rubber seals to seal out grime whereas providing friction free performance. Easy Installation & Replacement. Suitable for: TT02 TT-02 TT02D TT-02D 1/10 RC Car Tool Supplies:Assembly Category RC Parts & Accs:Servo Accessories Use:Vehicles & Remote Control Toys Technical parameters:Value 2 Remote Control Peripherals/Devices:Receivers For Vehicle Type:Cars Four-wheel Drive :Assemblage Wheelbase:Screws color:Silver+blue Material:metal+rubber Package Contents: four x Ball Bearing(5x11x4mm) four x Ball Bearing(8x12x3) eight x Ball Bearing(5x10x4mm) Only the above package content, various merchandise aren't included. Note: Light reflection and varied exhibits can cause the colour of the item within the photo just a little diverse from the real thing. The size allowed error is +/- 1-3cm.