Miniature deep groove ball bearings refer to the metric series with an outer diameter of less than 9mm; the inch series, with an outer diameter of less than 9.525mm! The main materials are carbon steel, bearing steel, stainless steel, plastics, ceramics, etc. Brand： JRZC/SUFUL Model： 6000-6200-6300 MOQ： 1000 Specification： Zz/2RS/Open Unit： pcs Package Instruction： Tube packing or OEM brand pac