30870401
This rear axle kit is used in several 2012 and newer Mavic MTB rear hubs including but not limited to:
Crossmax ST DiscCrossmax SLR Disc
Crossmax ST 29
Crossmax SLR 29
Crossmax Enduro WTS 26
Crossmax Enduro WTS 650b
Crossmax SLR 650b
Mavic Part #: 30870401