Shock strength adjustable. Best choice for replacement, style upgrading or bike modification Fit bikes with shock absorbers of 320mm eye to eye distance,The diameter of the round hole at the bottom is 12mm Fit on most 150cc~750cc Sport bikes and Dirt Bikes, Go-kart and Moped Quad Motorcycle shock absorber universal fit for most vehicles, like HD/YMH/KWK, etc Please check the size details and make sure it will fit your bike before purchase Product Description Fitment: Universal Fit Work perfectly on most 150cc~750cc street bikes, Karting(Go kart), Scooters and Moped Quad (ATV) with shocks of 320mm eye to eye distance. Great choice for replacement, style upgrading and all kinds of bike modification. Color: Black Condition: Brand new 320mm 12.59″ A Pair Rear Nitrogen Shock Absorbers Material: Solid Steel+Aluminium Alloy Installation Type: Eye to Eye Dimension: Total Length: 350mm (13.78″) Length of Eye to Eye Core: 320mm (12.59″) Eye Diameter(with bushing): 12mm Eye Diameter(with bushing