... . Insert Ball Bearing with Collar four-star, with the top wire ball 2.Material:Chrome Steel, 3.High quality&Fast ... Insert Ball Bearing with Collar four-star, with the top wire ball Specification:1.Bore diameter: from 12mm to ... , Motor, Pump, Fan, Air conditioner, Microwave Oven ,Sewing Machine, Massage Chairs, Agriculture Machinery, Fitness equipment, Washing Machine, Office equipment. Dimensions ...