Shock Absorber Adjustable Multiple-Varying Orifice Material Steel Force 7.4 lb Max Cycle Rate 60 per min Max Weight 661 lb Rod Thread Size M25x1.5 Locking No Rod Dia 8 mm Cylinder Dia 25 mm Stroke 30 mm Extended Length 169.5 mm Fixed Resistance No Adjustable Resistance Yes Includes Adjustment Knob