Wanyifa 6.5mm Titanium Ti Bicycle Crankset Chainring Bolts & Nuts for SRAM Shimano Pack of 5 Material: 6AL/4V Titanium Alloy, Grade 5 Bolt Head Diameter: 12mm;Bolt Thread Diameter: 8mm/M8 Bolt Thread Length: 6mm Nut Head Diameter: 12mm;Nut Shaft Diameter: 10mm;Nut Shaft Length: 6.5mm Weight: 3g/pair ;Package Content : 5 Pair Titanium Crankset Chainring Bolts & Nuts