Material: 6AL/4V(TC4)Titanium Alloy,Grade 5 | Thread Pitch : 0.8mm;Hex Wrench Size : 4mm(DIN912 standard) | Weight : About 2.2g/Piece(M5x18mm) | Package Content : 6 x Hex Socket Tapered Head With Washers Bolts | Available in 5 Colors, Lightweight, No Rust. Widely Used in Road Bikes, Mountain Bikes, for 3T, FSA, Bontrager and other Brands Stem