Universal Fit. Nitrogen reservoir: YES Shock strength adjustable.Best choice for replacement, style upgrading or bike modification. Fit on most 150cc~750cc Sport bikes and Dirt Bikes, Go-kart and Moped Quad. Fit bikes with shocks of 400mm eye to eye distance. Please check the size details and make sure it will fit your bike before purchase. Other size please check for your reference. Color:400mm Silver Black Fitment: Universal Fit. Work perfectly on most 150cc~750cc street bikes, Karting(Go kart), Scooters and Moped Quad (ATV) with shocks of 375mm eye to eye distance. Great choice for replacement, style upgrading and all kinds of bike modification. **Please check below dimension before purchase. Dimension: Total Length: 430mm (17″) Length of Eye to Eye Core: 400mm (15 3/4″) Eye Diameter(with bushing): 12mm Eye Diameter(with bushing removed): 16mm Eye Thickness: 21mm Eye Maximum Tensile Strength: 2,000 Kgf Spring Thickness: 7mm Spring Width: 60mm