Set of RV Marine Gas Spring/Prop/Strut/Shock 12" extended length x 8.5 " compressed length x 30 LB Pressure Extended Length: 12" (center to center of ball socket ends) Compressed Length: 8.5" Force: 30 pounds of pressure (Per Prop) End Fitting: 10mm 16 Degree Ball Socket and 10mm Ball Socket Set of Two