Features1Made from aluminum alloy for stiffness and durability. 2Easy to install, great replacement rear hub thru axle for your bike.SpecificationFeatures:Made from aluminum alloy for stiffness and durability.Easy to install, great replacement rear hub thru axle for your bike.Specifications:Material: Aluminum alloyModel:TZ13 / TZ15 / TZ16 / TZ18 /TZS21 / TZS22 / TZS25 / TZS26 (optional)TZ13:12*171L*M12(P1.5)*19L, compatible with 142*12mm framesTZ15:12*175L*M12(P1.5)*19L, compatible with 148*12mm frames (1.5mm thread pitch)TZ16:12*175L*M12(P1.75)*19L,compatible with 148*12mm frames (1.75mm thread pitch)TZ18:12*181L*M12(P1.5)*19L, compatible with148*12mm framesTZS21:12*168L*M12(P1.0)*19L,compatible with 142*12mm framesTZS22 (with 1mm spacer):12*171L*M12(P1.5)*19L,compatible with 142*12mm framesTZS25 (with 1mm spacer):12*175L*M12(P1.5)*19L,compatible with 148*12mm frames (1.5mm thread pitch)TZS26 (with 1mm spacer):12*175L*M12(P1.75)*17L,compatible with 148*12mm frames (1.75mm thread pitch)Package List:1 * Rear Thru AxlePackage List1 * Rear Thru Axle