Part number:6004ZZ Type: deep groove ball bearing Inside diameter: 20mm Outside diameter: 42mm Thickness: 12mm Weight Seal type: ZZ Dynamic Load Rating: 2120 LBS Static Load Rating: 1140 LBS Limiting Speed (Grease): 10000 RPM Wheel hub bearings are key components for automobile, which are applied to chassis system. The main function is to support the weight and guide the rotation of wheel hub. They allow each wheel to spin freely and at the desired speed. They support the entire weight of your vehicle while traveling over rough roads, potholes and other rugged terrain. Wheel bearings are one of the longest lasting steering and suspension parts, but it really depends on driving habits, driving conditions and other factors. VSPZ has a complete range of wheel bearings, and free maintenance, free clearance adjustment and free injection oil ester. VSPZ wheel bearings has high reliability and long life. It is used in all kinds of passenger cars and commercial vehicles.