Dampers Extension Only Material Steel Max Weight 2 248 lb Locking No Rod Dia 0.55 in Cylinder Dia 1.57 in Fitting Type Elbow Fitting Thread Size M10 Ball Diameter 0.62 in Stroke 11.81 in Extended Length 30.12 in Compressed Length 18.31 in Fixed Resistance No Adjustable Resistance Yes Damper Type Extension Only