One RV Marine Gas Spring/Prop/Strut/Shock 13" extended length x 8.1 " compressed length x 34 LB Pressure Extended Length: 13" (center to center of ball socket ends) Compressed Length: 8.1" Force: 34 pounds of pressure (Per Prop) End Fitting: 10mm 16 Degree Ball Socket and 10mm Ball Socket One Shock Only