Features:Pressure can be adjusted by springs and air (nitrogen).High quality,high-performance motorcycle parts.The damper and spring designed for long durability.Reduce bumps in the driving of motorcycles.Easy to install.Specification:Product Name: Shock AbsorberColor: Black Gold+Black Is Avaiable Material: Aluminum+IronTotal Length: 370mm/14.56″Eye Core Length: 340mm/13.38″Eye Diameter: 12mm/0.7″Eye Thickness: 20mm/0.78″Spring Thickness: 8mm/0.31″Spring Width: 60mm/2.36″Working Stroke: 68mm/2.67″Factory Air Pressure: 0.4 MpaMaximum Air Pressure: 0.5 MpaAir Reservoir: AdjustablePlacement On Vehicle: Rear,Left, RightQuantity: 2PCSFitment: For work on most 150cc~750cc street bikes, karting(go kart), scooters and moped quad (ATV) with shocks of 340mm eye to eye distance.(Please Compare With Your Original One Before Purchasing!)Package Includes:2 Shock Absorbers2 Eye Cores2 Adjust Spring Tools