Shock Absorber Adjustable Multiple-orifice Material Steel Force 2.2 lb Max Cycle Rate 60 per min Max Weight 8.8 lb Rod Thread Size M12x1 Locking No Rod Dia 3.5 mm Cylinder Dia 12 mm Pin Dia 3.5 mm Stroke 10 mm Extended Length 76 mm Compressed Length 40mm Fixed Resistance No Adjustable Resistance Yes Includes Adjustment Knob