Materials: Titanium Gr2,Gr5(6Al4V),Aluminum 7075-T6,6061-T6 Spec:DIN912,Taper Head,M6x8mm Treatments:Polished,Anodizing Titanium Ti Bolt XTR M970 Rear Derailleur,Ti Titanium bicycle parts CNC MachiningMaterials: Titanium Gr2,Gr5(6Al4V),Aluminum 7075-T6,6061-T6Spec:DIN912,Taper Head,M6x8mmTreatments:Polished,Anodizing(Blue,Gold,Red,Black)