Detailed Product Description Deep Groove Ball bearings1- Bore diameter from 4mm~90mm;2- Bearing range: 1) 60 series: 604, 605, 606, 607, 608, 609 ... , 697, 698, 699, 6900, 6901, 6902, 6903, 6904, 6905, 6906; 7) 16000 series: 16001, 16002, 16003, 16004, 16005, 16006, 16007, 16008 ... , 16009, 16010, 16011, 16012; 8) Inch series: R3, R4, R4A, R6, R8, R10, 1602 9 ...