Deep Groove Ball Bearings 1 Less friction & low noise 2 High quality & ... 6200,6300,6400,6800,6900,16000,62200,62300 & NR series bearings 3 Material: Carbon Steel, Chrome steel, Stainless steel, ceramic ... bearings4 Extra-large size bearings, which Id ranges from 180mm-3600mm.5 Shield/closure: Opened ... to clients' drawing and samples. deep groove ball bearings