Set of RV Marine Gas Spring/Prop/Strut/Shock 15.66" extended length x 9.37 " compressed length x 40 LB Pressure Extended Length: 15.66" (center to center of ball socket ends) Compressed Length: 9.37" Force: 40 pounds of pressure (Per Prop) End Fitting: 10mm 16 Degree Ball Socket and 10mm Ball Socket Set of Two