thrust roller bearings 1.high precision and speed 2.long life and low price 3.good quality 4.timely delivery Thrust roller ... general, this type of bearings permits a low limiting speed.2.Bearing Number(1): 21308, 21308K, 21308KW33C3, 21308W33C3 ... 21317KW33C3, 21317W33C3, 21318, 21318K, 21318KW33C3, 21318W33C3, 21319, 21319K Bearing Number(2): 22205, 22205K, 22205KW33C3, 22205W33C3, 22206, 22206K, ...