Aluminum uprights are popular as standard upgrade parts for M-05 chassis (Rally Chassis). These aluminum front uprights feature a shape specially designed for the M-05Ra chassis.*Note: These aluminum uprights can also be used with M-05 chassis machines but they must be used with the M-05Ra Hub Carrier included with Item 51425 M-05Ra F Parts (separately available).*Use with separately available Item 51239 1050 Ball Bearing Set (4pcs.)Includes:L/R Aluminum Upright x 1pc eachFlanged tube for kingpin & screw x 4pcs each5mm ball connector (long/short) x 2pcs eachSpecifications:Compatible with M-05Ra chassis machines.