Its high strength rebound motion of the shock release you in harsh driving conditions. Our products are made by high- qualified materials with technology and the advanced computer numerical control processing. The is strictly monitored by standard to make sure the excellent performance and the good condition in the long- term use. The point of performance and price comfortable,stable, high quality,high- performance motorcycle parts The hardness of the spring is adjustable; Spring stroke adjustable. Rebound rate adjustable. Color:Round Product Name: Motorcycle shock absorber Hole pitch: 320 mm Eye diameter: 10mm Spring diameter: About 6cm ltem Type: Falling Protection Item Height: 0.1inch Item Width: 0.1inch Item Weight: 1.5kg Material Type: All Alloy Item Length: 0.1inch Model Name: Rear Shock Absorber Hole pitch: 320mm. Applicable models: Universal for most of models with 320mm mouting hole pitch Function: 2 gas cylinders design,built- in nitrogen balloon, inflatable, shock and harden the hardness depends on the air inside the ball is full. note: If you have any problems with our items or services, please contact to us first?? We will do our best to solve any problems and provide you with the best customer service. Please check the size details and make sure it will fit your bike before purchase.