This Bearing has C3 radial internal clearance which provides it with room for expansion between the races if needed. Made from Chrome Steel, 6006C3 is a Metric Ball Bearing that can withstand both moderate radial and axial loads while providing high performance. Our 6000 Series Extra Light Duty Ball Bearings are available either Open, Metal Shielded, or with Rubber Sealed Closures and are pre-lubricated with Grease or Light Oil.