Description: Length of Eye to Eye Core: 320mm (12 5/8″) Standard Hole Internal Diameter : 12mm Spring Dia:8mm Working Stroke: 60mm Maximum load: 200 kg (440 lbs) Material: Aluminum & Solid Steel Color: Black & Golden Size: 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.