SHOCKS AND SHOCK KITSES9000 SERIES SHOCK TWIN TUBE CELLULAR GASTwin Tube Nitrogen Gas Charged Cellular Gas Design10 Stage Velocity Sensitive ValvingDelivers A Smooth Comfortable Highway RideEnhances Off-Road Handling And PerformanceOptimum Capacity For Heavy LoadsMaximum Strength And Long Lasting DurabilityTwin tube design and 10 stage velocity sensitive valving delivers a smooth, comfortable high ride, but also enhances off road handling and performance. A 1 3/8 nylon banded full displacement piston head and double welded shock mounts ensure maximum strength and long lasting durability.ShockAbsorbers Stabi