Gas Spring, Rigid Locking, Material Steel, Force 40 lb, Rod Thread Size MF10, Locking Yes, Rod Dia. 0.39 in, Cylinder Dia. 0.87 in, Fitting Type Elbow 1-Side, Fitting Thread Size M8, Stroke 10.04 in, Extended Length 29.92 in, Compressed Length 19.88 in, Fixed Resistance Yes, Adjustable Resistance No