... wheel, sprocket wheel. Titanium and Titanium alloy specifications: 1Common Ground a, Bolt sizes:M4-M22*length b, Nut sizes:M4-M22 ... : a, Titanium for the chemical aspects,PCBequipment,electrodes. b, Titanium alloy used in Bicycle,Motorcycles,Electric Vehicles,Medical,Aircarft,Weapons etc Bicycle pedal shaft ...