Its high strength rebound motion of the shock release you in harsh driving conditions. Built- in hydraulic airbag, 24 segments adjustable soft and hard damping. Damping spring can adjust soft and hard, high comfort, super soft. Suitable for motorcycles with 2 piece rear shock absorbers. We will do our best to solve any problem and provide you with the best customer services. Product Description Name: Motorcycle rear shock absorber Material: T6063 aluminum alloy Process: CNC precision numerical control Color: black size: Eye-to- eye core length: 320/340/360mm Eye diameter ( with sleeve): 10 mm Eye thickness: 21mm Maximum tensile strength of eyes: 2, 000 Kgf Spring width: 64mm Spring thickness: 7mm Working stroke: 55mm Spring stiffness: 110 kg Maximum load: 200 kg ( 440 lb) Air storage: adjustable Factory air pressure: 0. 4 Mpa Maximum air pressure: 0. 5 Mpa Number of pounds: 80 pounds per stick Installation position: rear shock absorption Installation method: straight up