10 PACK 5x10x4mm Metal Shielded Ball Bearings MR105ZZ - Apex RC Products #1920M 1 Package includes TEN (10) Bearings Each Bearing Measures: Inner Diameter: 5mm / Outer Diameter: 10mm / Width: 4mm Direct OEM Replacement for Traxxas, HPI, Associated, Tamiya, Kyosho, and many other popular vehicles Precision steel balls Metal seals keep dirt out!