Industry Nine Freehub bodies are machined in North Carolina and contain all necessary pawls, springs and bearings for servicing or converting their hubs.Micro Spline kit also includes MS Drive-Side Endcap and freehub body sealConvert or replace your existing Hydra mountain freehub body with this complete MicroSpline kit. Includes everything you need to swap the freehub and get ridingKits include freehub, bearings, inner spacer, pawls, and springsItem SpecificationsCassette Body TypeShimano Micro Spline Industry Nine Freehub Freehub Body UPC: 810098984409