A Pair of RV Marine Gas Spring/Prop/Strut/Shock 26.34" extended length x 16.5 " compressed length x 150 LB Pressure Extended Length: 26.34" (center to center of ball socket ends) Compressed Length: 16.5" Force: 150 pounds of pressure (Per Prop) End Fitting: 10mm Ball Socket and 10mm Ball Socket Set of Two