Features: This bike dropper seatpost comes with the hand regulation design, and oil and air mixing system. Make from aluminium alloys, this dropper seatpost is both light weight and strong. Having excellent shock absorption performances, it can effectively absorb the impact caused by road bump, providing riders with a smooth and comfortable cycling experience. Easy adjustment of seat height through the handle, locking at any position within ranges of travel, enhancing cycling comfort and flexibility. With option of 125mm, 150mm, and 170mm travel, this seatpost allows riders to customize their cycling experience. Specifications: Component: Aluminum alloys Type: 31.6-125 trip/31.6-150 trip/31.6-170 trip 31.6-125 trip Length: about 31-43.50cm/12.2-17.13inch 31.6-150 trip Length: about 33.5-48.50cm/13.19-19.09inch 31.6-170 trip Length: about 35-52cm/13.78-20.47inch Package Includes: 1pc Mountain Bike Seatpost note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.