Ritchey WCS seatpost, 27.2 x 350mm - wet black Clamp Style: Std RailsDiameter: 27.2mmDiameter: 27.2mmMaterial: AluminumMax Height: 275mmOffset: 20mmOffset: 25mmSeatpost Color: wet blackSeatpost Diameter: 27.2mmSeatpost Length: 350mmWeight: 220g