... ,2RS,N,NR bearing 3.material:Chrome steel 4.less coefficient of friction 5.wide varieties 1.6000, 6200, 6300, 6400, 6800 ... 16000 series2.inner packing:plastic bag,tube in carton3.less coefficient of friction, high limiting speed,4.large size range and colorful ... combination of structure; 5.used in tactors, motors, automobiles, motorcycles, and other ...