China Ball Bearing 6312ZZ - China Ball Bearing, Bearing: 6203ZZ,6204ZZ,6205ZZ,62 The Number of Rows Outer Dimension 7mm-500mm Load Direction Radial Bearing Separated Unseparated Trademark nbay nsk skf ntn koyo nachi. Zaozhuang ShuangCheng Bearing Co., Ltd. - Bearing, Linear.