4-Pack RM2-2RS 3/8'' Track Roller Ball Bearing V-Groove - Sealed W2-2RSRM2 2RS V Groove Roller Bearings 3 8" Rubber Sealed Track Rollers Set of 4 This set of 4 RM2 2RS V groove bearings is designed for smooth motion along linear tracks and guide rails. Each bearing features double rubber seals for protection against dust and debris, and is built to handle heavy loads with reliable performance in automation systems, sliding doors, and CNC setups. Quantity: 4 Bearings Type: V groove guide track roller bearings Bore