Its high strength rebound motion of the shock release you in harsh driving conditions. Designed and manufactured according to the original standard, it is easy to install, easy to use, economical and practical. 100% brand new, please be assured of your purchase. Absorb shock promptly in the clumpiest road to improve and make you feel more comfortable Helps absorb and dampen road input into your vehicle??s suspension Progressively wound springs for a smooth, comfortable ride Color:M99 18 1 320mm Feature: 1. Oil seal by N.O.K 2. The eye of shock has tensile strength more than 2000kgf. 3. The dumper and spring designed for long durability(mor than 1 million) 4. The point of performance and price comfortable,stable, high quality,high-performance motorcycle parts 1,Gas charging nozzle inflatable pressure is less that 0.5Mpa Nitrogen Gas . 2,Spring Pre-Load Adjustment The Adjustment Range is 20mm Maximum 3,Set Level Adjustment (The Adjustment Range is 10MM) Item Height: 6inch