3T Doric Limited Seatpost Diameter: 27.2 mm, 30.9 mm, 31.6 mmLength: 280 mm, 350 mm, 400 mmMaterial: [shaft] carbon fiber; [clamp] aluminumOffset: 0 mmCompatible Components: Weight: 181 gRecommended Use: cycling, training, racingManufacturer Warranty: