Dental ConsumablesChina 3X8X3 mm 693 R830 619/3 R3080 Open Miniature Ball Bearing for Office Equipment Micro Motor Fan Instrument Toy Model Laser Clock Dental Drill Machine Industry, Find details about China Bearing, Ball Bearing from 3X8X3 mm 693 R830 619/3 R3080 Open Miniature Ball Bearing for Office Equipment Micro Motor Fan Instrument Toy Model Laser Clock Dental Drill Machine Industry