A PAIR(2) BETTER BUILT Truck Pick Up Tool Box Chest Gas Strut Shock Spring Lift Prop 12.2" extended length x 8.3 " compressed length x 65 LB Pressure Extended Length: 12.2" (center to center of ball socket ends) Compressed Length: 8.3" Force: 65 pounds of pressure (Per Prop) End Fitting: 10mm Ball Socket and 10mm Ball Socket Set of Two