A Pair of RV Marine Gas Spring/Prop/Strut/Shock 18.2" extended length x 10.36 " compressed length x 27 LB Pressure Extended Length: 18.2" (center to center of ball socket ends) Compressed Length: 10.36" Force: 27 pounds of pressure (Per Prop) End Fitting: 10mm Ball Socket and 10mm Ball Socket Set of Two