2-Pack Ball Bearings for OS Engines FX-F1 160Ball Bearings Kit for OS Engines FX F1 160 Chrome Steel Rubber Sealed Set of 2 Bearings This bearing kit is designed specifically for OS Engines FX F1 160, offering smooth, long lasting performance under high RPM conditions. Each bearing is double rubber sealed and pre lubricated with low friction grease, making them perfect for high precision engine setups. Application: OS Engines FX F1 160 Closures: Double rubber seals (2RS) Lubrication: Low