10 PACK 5x11x4mm Metal Shielded Ball Bearings MR115ZZ - Apex RC Products #1925M 1 package includes ten (10) bearings. Direct oem replacement for traxxas, hpi, associated, tamiya, kyosho, and many other popular vehicles. Metal seals keep dirt out! Precision steel balls. Each bearing measures: inner diameter: 5mm / outer diameter: 11mm / width: 4mm.