A Pair of Camper Shell Cap SNUGTOP LEER Nitro-Prop Strut Spring Shock REP 22.87" extended length x 13 " compressed length x 37 LB Pressure Extended Length: 22.87" (center to center of ball socket ends) Compressed Length: 13" Force: 37 pounds of pressure (Per Prop) End Fitting: 10mm Ball Socket and 10mm Ball Socket Set of Two