pair of rear motorcycle shock absorbers, made of quality aluminum and stainless steel; Pressure can be adjusted by springs or air (nitrogen); Operation of the coil-over springs and air cylinder is helpful to reduce the shock. Shock Absorber bottom/ends type: Straight Fork No instruction included, professional installation recommended. Universal fit for most 340mm Motorcycle Shock Absorber For Honda/Yamaha/Suzuki/Kawasaki;Dirt bikes, Gokart, ATV, Motorcycles and Quad. Item Specific : Condition: Brand new Color: As picture show Material: Solid Steel + Aluminum Alloy Installation Type: Clevis/Straight Fork Fitment: Universal Fit. Work perfectly and will be compatible on most 50cc, 75cc, 90cc, 125cc, 150cc, 250cc, 300cc Street bikes, Dirt bikes, Gokart, ATV, Motorcycles and Quad Total Length:370mm (14.5″) Length of Eye to Clevis Eye Core:340mm Eye Diameter(with bushing): 12mm Eye Diameter(with bushing removed): 16mm Clevis Maximum Tensile Strength: 2,000 Kgf Spring Thickness: 8mm