... serviceAbout usNanjing Kaisheng Bearing Corporation, growing out of a manufacturer established more than 20 years ... include deep groove ball bearings with the specifications of 60, 62, 63, 64, 160, ... 42 and 43 seriesSelf aligning roller bearings with the specifications of 35, 36, 230, 231, 232, 239, ... 240, and 241 seriesTapered roller bearings with the specifications of 320, 302, 303, 322, 323, 329, ...