Use:Vehicles&Remote Control Toys RC Parts&Accs: Boxes Upgrade Parts/Accessories:Hydraulic Transmission Box Remote Control Peripherals/Devices:Servos Four-wheel Drive :Battery Tool Supplies:Assembled class For Vehicle Type:Cars Wheelbase:Screws Replacement part for RC Car Easy to install and use High quality alloy material helps you to control your car better Help you to have a better driving experience. Applicable model: For 12428 12423 Colour:Black Material:composite material Package Contents: 1* Metal rear differential gear 1* front wave box Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.