Its high strength rebound motion of the shock release you in harsh driving conditions. Products Are Made By High Materials, These Shocks Are Suitable For Heavy. Brand new a pair air shock absorbers is good for replacement. Good replacement and easy installation. The point of performance and price comfortable,stable, high quality,high- performance motorcycle parts. Color:Round Hole pitch: 320 mm Eye diameter: 10mm Spring diameter: About 6cm 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: No instruction included, professional installation recommended. If you have any problems with our items or services, please contact to us first?? Please check the size details and make sure it will fit your bike before purchase.