Wanyifa Titanium Ti M5x30mm Bolt Nut Washer for Thomson Seatpost Cycling Bolts Material: 6AL/4V(TC4)Titanium Alloy,Grade 5 Bolt size:M5x30mm Nut Size:length 15.5mm/0.61'',Diameter:8.5mm/0.33'' Total 12 gram 2 Bolts, 2 Nuts & 2 Washers for Thomson Seatpost