Structure: Deep Groove Type: Ball Bore Size: 90 mm Outside Diameter: 190 mm Model Number: 6318 Precision Rating: P0 P6 P5 P4 P2 Seals Type: OPEN ZZ 2RS Number of Row: Single Row Place of Origin: Hebei, China (Mainland) Material: Gcr-15,chrome steel,carbon steel,iron. stainless steel Samples: Always avaliable for testing before order Service: OEM offered Clearance: C0 C2 C3 C4 C5 vibration: Z1,Z2,Z3,Z4 Lubrication: oil, grease, dry Stock: Yes,Rich,Avablibe Application: Steering Box and Gearbox Hardness: Chrome Steel HRC60-HRC65 Noisy: V1,V2,V3,V4