Features1The height can be adjusted freely between 0~100mm. 2The hydraulic system can provide sufficient pressure , achieve better riding experience. 3Suspension seat post with coil spring improves both the riding comfort and the buffer ability. 4Extreme torsion (10.9 N ) being applied to the screws, offers superior stability. 5Clamp head angle is adjustable, you can find a comfort saddle angle for your personal love. 6Clamp head angle is adjustable, you can find a comfort saddle angle for your personal love. Seal ring isolates it from dust, water and prevents oil leakage efficiently. 7Quality Aluminum alloy construction,strong, durable and corrosion-resistant.SpecificationThe comfortable oil pressure suspension has a pain-relieving effect on the back area as it provides optimal shock absorption and makes soft reaction during Cycle. Features:The height can be adjusted freely between 0~100mm. The hydraulic system can provide sufficient pressure , achieve better riding experience. Suspension seat post with coil spring improves both the riding comfort and the buffer ability. Extreme torsion (10.9 N ) being applied to the screws, offers superior stability. Clamp head angle is adjustable, you can find a comfort saddle angle for your personal love. Seal ring isolates it from dust, water and prevents oil leakage efficiently. Quality Aluminum alloy construction,strong, durable and corrosion-resistant. Specifications:Material: Aluminum alloy. Color: Black. Angle: -5 Degree + 18 Degree Ttravel: 100 mm / 3.9 in Type: External Cable Routing / Internel Cable Routing ( optional ). Internal Cable Routing: Diameter: 30.9 mm / 31.6 mm (optional). Seat Tube Length: 400 mm / 15.7 in Inner Cable Length: 170 mm / 6.7 in Weight: 653 - 679 g / 23.0 - 24.0 oz External Cable Routing: Diameter: 30.9 mm / 31.6 mm (optional). Seat Tube Length: 375 mm / 14.8 in Weight: 628 - 650 g / 22.2 - 22.9 oz Product Weight: 1746 g / 3.8 lb Packing Size: 45 * 5 * 5 cm / 15.7 * 2.0 * 2.0 in Packing Weight: 700 g / 24.7 oz Package List:1 * Bike SeatpostPackage List1 * Bike Seatpost