Structure: Deep Groove Type: Ball Brand Name: GNY OEM Bore Size: 15.918 - 15.91801 mm Outside Diameter: 30 - 30.001 mm Model Number: WR1630103 Precision Rating: P0 P6 P5 P4 P2 Seals Type: no seal Number of Row: Other Place of Origin: Shandong, China (Mainland) Material: GCr15,GCr15SiMn Dimention: 15.918x30x103.12mm Web: www.semribearing.com Weight [ kg ]: 0.24 Vibration: Z1V1, Z2V2 Certification: ISO9001 Service: Customization & OEM Service Sample: Available / Free Market: Europe, Asia , Africa, America, North America, South America.etc Warranty: 1-2 Years