A PAIR(2) BETTER BUILT Truck Pick Up Tool Box Chest Gas Strut Shock Spring Lift Prop 14.5" extended length x 9.25 " compressed length x 25 LB Pressure Extended Length: 14.5" (center to center of ball socket ends) Compressed Length: 9.25" Force: 25 pounds of pressure (Per Prop) End Fitting: 10mm Ball Socket and 10mm Ball Socket Set of Two