Non-Drive Bearing for Rear Classic and ISO disc hubs. Not for use with R45 or front 20mm or 24mm hubs. 2 bearings are required, each sold separately, and this listing is for 1 only. We guarantee to you that each Chris King bicycle component you buy from us is absolutely brand new with full warranty, and that we are an authorized Chris King dealer. Genuine factory replacement part. For diagrams of Chris King hub parts and a wealth of other information, see the Chris King website. American made in USA (U.S.A.)