This air shocks are universal parts. Can be used on most 150cc-750cc Sport bikes, Dirt bikes, Go-kart, ATV, UTV, Moped Quad, Street bike and so on. Suitable for motorcycles, ATV, quads with shocks of 320mm eye to eye distance. This shocks was already filled with nitrogen gas in the factory, you are able to change the shock power by adjust the air reservoir. Easy installation. Instruction is NOT include. Package Include: 1 Pair 320mm shock absorbers. Universal 320mm 12.6″ Clevis End Motorcycle Rear Air Shock Absorber Specification: Condition:100% Brand New Color: As the Pictures Shown Size of Inner Copper Sleeve:12mm Size and Quantity of External Copper Sleeve: 2*10mm Spring Diameter:about 8mm Spring Width:about 61mm Length of Eye to Eye Core: 320mm Adjustment Tool:1pc wrench Placement on Vehicle: Rear Features: *Made of high quality material,ensure maximum strength and durability for long lasting usage. *Ensure the comfort when riding. *No instruction included, professi