Features: This bike dropper seatpost comes with the hand regulation design, and oil and air mixing systems. Make from stainless steel, this dropper seatpost is both light weight and strong. Having excellent shock absorption performances, it can effectively absorb the impacts caused by road bumps, providing riders with a smooth and comfortable riding experience. Easy adjustment of seat height through the handle, locking at any position within the ranges of travel, enhancing riding comfort and flexibility. The seatpost can be freely adjusted within the ranges of 0-125mm to meet the height requirements of different riders. Specifications: Component: stainless steel Diameter Option: about 27.2mm(1.07inch)/28.6mm(1.13inch)/30.4mm(1.2inch) Trips Length: about 125mm/4.92inch Total Length: about 455mm/17.91inch Package Includes: 1pc Mountain Bike Seatpost note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.