Detailed Product Description Deep Groove Ball bearings1- Bore diameter from 4mm~90mm;2- Bearing range: 1) 60 series: 604, 605, 606, 607, 608 ... , 6211, 6212, 6213, 6214, 6215, 6216, 6217, 6218; 3) 63 series: 635, 6300, 6301, 6302, 6303, 6304, 6305, 6306, 6307, 6308 ... , 699, 6900, 6901, 6902, 6903, 6904, 6905, 6906; 7) 16000 series: 16001, 16002, 16003, 16004, 16005, 16006, 16007, 16008, 16009, 16010 ...