Thun Bottom Bracket ´´Efficient Jive´´ square taper, BSA thread, incl. 2 fasten?ng bolts self-service package, functional shoulder (FS) left, axle made of special hardend material with (ML-hardness) in the European standard ISO 4210 (MTB standard), optimum rotation quality because of double sealed industrial bearings, zinc-coated steel sleeve to protect the bottom bracket, Durethan thread adapter, bolts with polyamide-stain cover, assemble note: shell torque: 30Nm; bolt torque: 40Nm 110 mm axle length.