Description:Length of Eye to Eye Core: 320mm (12 5/8″)Standard Hole Internal Diameter : 12mmSpring Dia:8mmWorking Stroke: 60mmMaximum load: 200 kg (440 lbs)Material: Aluminum & Solid SteelColor: Black & GoldenSize: 38 ?? 8 ??22 cm Fitment:Universal Fit. Work perfectly on most 150cc~750cc street bikes, 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 Package included:2 ?? Shocks No fitting manual included. Recommend qualified mechanic fits or checks after the fitting of this product.