Wanyifa Titanium Ti Cycling Bike Bicycle Seatpost Clamp Material: 6AL/4V(TC4)Titanium Alloy,Grade 5 Weight( With Bolt) : 34.9mm/20g;31.8mm/17g Height:12mm Compatible:34.9mm For 30.8mm 30.9mm 31.6mm Seatpost;31.8mm For 27.2mm Seatpost Package Content : 1 x Titanium Seatpost Clamp