Professional manufacturer of deep groove ball bearings. 608-6024, 625-6220, 6300-6320, 6403-6415,6800-6815 ... 6915 quality: We are the professional manufacturer of deep groove ball bearings in China. We built:1985 The staff: 2000 Our ... Quality: good and steady quality with ISO9001 Products: deep groove ball bearings, roller bearings. Materials: chrome steel Technology: low vibration, low noise, high ...