A PAIR(2) BETTER BUILT Truck Pick Up Tool Box Chest Gas Strut Shock Spring Lift Prop 11" extended length x 7.5 " compressed length x 60 LB Pressure Extended Length: 11" (center to center of ball socket ends) Compressed Length: 7.5" Force: 60 pounds of pressure (Per Prop) End Fitting: 10mm Ball Socket and 10mm Ball Socket Set of Two