RPM Rear Traxxas Stub Axle Carriers allow e-Rustler, e-Stampede, Slash & Bandit owners to install massive 5mm x 11mm bearings (not included) that will not only improve performance, but will increase the time interval between maintenance periods. NOTE: 5x11x4mm bearings are not included. 4 bearings are required. Features: Fits the 2WD Slash, Electric Rustler, Electric Stampede 2WD and Bandit Replaces stock Traxxas #3752 5x11x4mm size bearings not included Available in Black and Blue