A PAIR(2) RV Camper Bus Van Coach Gas Strut Spring Lift Support Rod 30.9" extended length x 17.125 " compressed length x 90 LB Pressure Extended Length: 30.9" (center to center of ball socket ends) Compressed Length: 17.125" Force: 90 pounds of pressure (Per Prop) End Fitting: 10mm Ball Socket and 10mm Ball Socket Set of Two