... angular contact ball bearing 2.advanced German technology3.15 years of manufacturer4.ISO9001:2008 approval A.Description:1.Item: 3303 ... ×47×22 (mm) 3.material: chrome steel & Gcr15 4.Variations of structure: 7000C, 7000AC, 7000A, 7000B, dB, DF, QJ, QJF. ... widely used in oil pump, roots blower, air compressor, air blower watts of all kinds of transmission, fuel injection pump, printing machines; B ...