Gas Spring, Mechanical Traction, Material Carbon Steel, Force 21 lbf, Rod Thread Size M6x1.0, Locking No, Rod Dia. 0.315 in, Cylinder Dia. 0.71 in, Fitting Type None, Stroke 4, Extended Length 12 11/16 in, Compressed Length 8 11/16 in, Fixed Resistance Yes, Damper Type Extension Only