One Gas Prop Lift Springs Rod Struts Heavy Duty Tool Box Lid Top RV 36" extended length x 20.5 " compressed length x 90 LB Pressure Extended Length: 36" (center to center of ball socket ends) Compressed Length: 20.5" Force: 90 pounds of pressure (Per Prop) End Fitting: 10mm Ball Socket and 10mm Ball Socket One Shock Only