6061-T6 aluminum axle with hard anodized finish. Use the Boost Shimano version for: DV9 MOJO 3 - 4 MOJO HD 3 - 5 RIPLEY 2 LS RIPLEY 3 - 4 RIPLEY AF RIPMO 1 - 2 RIPMO AF Use the standard Shimano version for the following 12x142mm models: Ripley 2 / LS HKMX Use the SRAM version for the following 12 x 142mm models: Mojo SL / SLR Mojo HD / HDR Mojo HD3 (142mm spacing) Ripley 1 T29 NOTE: There is not a numerical torque figure for the Hexle. We recommend tightening the 5mm with your multi tool that you carry with you. This way you’ll be able to remove it in case of a flat out on a ride.ANOTHER NOTE: If you are looking to retrofit your non-Ibis bike with one of our Hexle's, you'll need to know the standard or thread pitch. For some reason, our industry has decided we need three different thread pitches for through axles:Syntace, Specialized and DT use 12x1.0Shimano is 12x1.5Rock shox maxle is 12x1.75Your bike manufacturer should be able to tell you which of these you need.For reference here are the shaft lengths of the various options: SRAM 142: 175mmSRAM 148 Boost: 174mmShimano 142: 165mmShimano 148 Boost: 171mm