Description: This bike seat post is crafted from high-quality aluminum alloy, combining lightweight properties with exceptional strength. Its frosted surface and classic pillar style design not only enhance its aesthetic appeal but also provide a comfortable and secure grip. Available in various sizes (33.9/34.9mmx 350/450/550mm), it caters to a wide range of needs, ensuring compatibility with most saddles equipped with a clamp. Specifically designed for folding bikes, this seat post promises easy installation and a perfect fit. Specification: - Material: Aluminum Alloy - Color: Black - Inner Diameter: 33.9mm/0.87inch; 34.9mm/1.37 inch - Length: 350mm/13.78inch, 450mm/17.7 inch, 550mm/21.6inch (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.