A PAIR(2) Nitro-Prop Gas Strut Shock Spring Support Shaft Arm 14" extended length x 8.5 " compressed length x 24 LB Pressure Extended Length: 14" (center to center of ball socket ends) Compressed Length: 8.5" Force: 24 pounds of pressure (Per Prop) End Fitting: 10mm Ball Socket and 10mm Ball Socket Set of Two