Made of brass materialHigh precision CNC machinedAdd weight for each side to anti- stability and climbing capabilitySteering Block Weight: 11g/pcs (0.39oz)Caster Block Weight: 4g/pcs (0.14oz)Tool Supplies:Assembly CategoryRC Parts & Accs:Servo AccessoriesUse:Vehicles & Remote Control ToysTechnical parameters:Value 2Remote Control Peripherals/Devices:ReceiversFor Vehicle Type:Four-wheel Drive :AssemblageWheelbase:Screwscolor:YellowMaterial:brassPackage Contents:2 x RC Car Brass Steering Blocks2 x RC Car Brass Caster BlocksOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.