Bicycle Bike M6x30mm Titanium Bolts Allen Hex Socket Cap Head Bolts Screw Colorful Gold 6 Pieces Set (Gold) Fantastic corrosion resistanceNo rust Material: Titanium Alloy 6AL/4V Gr 5,Aerospace Grade Specification: M6 x 30mm. 4.5g/piece Head : Allen Hex Socket Cap Head Bolt Pitch Standard: DIN912