12x18 Rubber Sealed Ball Bearings (10) 12x18x4 for Traxxas RC Vehicles 5120 Slash 4x4 Revo E-Maxx E-Revo XO-1 T-Maxx TRA5120 Rubber Sealed Ball Bearings have maximum protection, and are ideal for off-road racing. They protect well against exposure to dust, dirt, and moisture, which can destroy bearings. Includes ten (10) replacement 12x18 Ball Bearings for Traxxas RC Vehicles (or any other applications where 12x18x4mm 6701 bearings are required). Advantage Bearings have been run by some of the fastest racers in the world and have won multiple ROAR US National Championships. Over 250,000 bearings have been sold to satisfied racers all over the world! Meets/Exceeds OEM Specifications for Traxxas 5120 (TRA5120) 12x18 Ball Bearings, used in many Traxxas models. Please reference your manual for required sizes and installation instructions. Known to be Compatible With: Traxxas Slash 4x4, Revo, E-Maxx, Stampede 4x4, E-Revo, Summit, Rally, XO-1, Telluride, T-Maxx, X-Maxx, Ford GT, Rally Fiesta NOS, TRX-4