... Steel 16072 360 540 57 Bearing Steel 2012 high precision all types of deep groove ball bearings1) Good quality, competitive prices ... noise , and non-standard deep groove ball bearings. The main series we produce are 6000, 6200, 6300,6400, 6800 , 6900 and ... . You are welcome to visit and negotiate! 2012 China bearing all types of bearings 16000 Series