Freehub body aluminium SRAM XD, black with ceramic ball bearing incl. adapter for 157/148/142mm x 12mm thru axle.
The conversion kits are designed for the new 180 EXP hubs. They are also compatible with the 240s EXP hubs and can be used as an upgrade. The conversion kits are not compatible with the original Ratchet system (installed on the current 350 hub and on the previous versions of the 180s and 240s)!