A Pair of Gas Prop Lift Springs Rod Struts Heavy Duty Tool Box Lid Top RV 14" extended length x 8.5 " compressed length x 10 LB Pressure Extended Length: 14" (center to center of ball socket ends) Compressed Length: 8.5" Force: 10 pounds of pressure (Per Prop) End Fitting: 10mm Ball Socket and 10mm Ball Socket Set of Two