Wanyifa Titanium Ti Motorcycle Rear Brake Rotor Bolt Screw M8 x 20mm for YAMAHA Pack of 5 Material: 6AL/4V(TC4)Titanium Alloy,Grade 5 Weight: about 6g/Pcs ;Thread Diameter 8mm/0.31'' Head Diameter:16mm/0.63''; Thread length:15.2mm/0.6'' Specification: M8 x 20mm Package Content : 5 x Titanium M8x20mm Bolts