Machined. Anodized Integrated axle housing design for durable Part of the gear is built-in, which can be installed by removing the old gear Weight:364g Suitable for: -4 1/10 RC Crawler 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: Four-wheel Drive :Assemblage Wheelbase:Screws color:Black Material:Metal Package Contents: 1 x Front Portal Axle Housing 1 x Rear Portal Axle Housing 1 x Steering Link Only the above package content, other 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.