... and good quality 4,The materials are bearing steel Specificationsdeep groove ball bearing manufacturer in Shandong. Certification:ISO9001:2008 Faster ... Delivery Steady Quality Deep groove ball bearing1)Material: Gcr15, Bearing Steel, Carbon Steel, Chrome Steel2)Cage Material: Brass, ... 6004, 6005, 6006, 6007. 6008, 6009, 6010;6200 Series:625, 626, 627, 628, 629, 6200, 6201, 6202, 6203, 6204, 6205 ...