Made of high quality carbon fiber material, lightweight, durable and strong. Frosted surface, classic pillar style design, exquisite workmanship, nice touch feeling. Multi Sizes for different needs(25.4/27.2/30.8/31.6mm x 350/400mm) with 5 degree and 25 degree tilt. Easy to install. Come with fixing screws and seat bow buckle. High strength and fatigue resistance. Suitable for most style bicycle saddles with clamp. Professional Design: Sturdy structure, numerical controlled precision bending. Shockproof and durable. NOTE: Please make sure above the minimum safety line when installing. Specification: Material: Carbon Fiber Color: Black Inner Diameter: 25.4mm/1inch; 27.2mm/1.07inch; 30.8mm/1.21inch; 31.6mm/1.24inch Length: 350mm/13.78inch, 400mm/17.7inch (optional) Package Includes: 1 Piece Bike Seat Post Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.