Kalloy Guizzo 27.2 x 350mm.7075 Aluminum Clamp Style: Std RailsDiameter: 27.2mmDiameter: 27.2mmMaterial: 7075 AluminumMax Height: 220mmOffset: 0mmSeatpost Color: BlackSeatpost Diameter: 27.2mmSeatpost Length: 350mmSetback: 0mmWeight: 254g