Gas Spring, Spring Locking, Material Steel, Force 20 lbf, Rod Thread Size MF10, Locking Yes, Rod Dia. 0.39 in, Cylinder Dia. 0.87 in, Fitting Type Elbow 1-Side, Fitting Thread Size M27, Stroke 7.87 in, Extended Length 19 7/8 in, Compressed Length 12 1/64 in, Fixed Resistance Yes, Adjustable Resistance No