Shock Absorber, Adjustable; Multiple-Varying Orifice, Material Steel, Force 4.6 lb, Max. Cycle Rate 60 per min, Max. Weight 441 lb, Rod Thread Size M20x1.5, Locking No, Rod Dia. 6 mm, Cylinder Dia. 20 mm, Stroke 16 mm, Extended Length 127 mm, Fixed Resistance No, Adjustable Resistance Yes, Includes Adjustment Knob