Shock Absorber Fixed Material Steel Force 2.6 lb Max Cycle Rate 45 per min Max Weight 66 lb Rod Thread Size M20x1.5 Locking No Rod Dia 7 mm Cylinder Dia 20 mm Ball Diameter 21 mm Pin Dia 7mm Stroke 15 mm Extended Length 103 mm Compressed Length 55mm Fixed Resistance Yes Adjustable Resistance No