A Pair of Camper Shell Cap SNUGTOP LEER Nitro-Prop Strut Spring Shock REP 18.7" extended length x 10.8 " compressed length x 35 LB Pressure Extended Length: 18.7" (center to center of ball socket ends) Compressed Length: 10.8" Force: 35 pounds of pressure (Per Prop) End Fitting: 10mm Ball Socket and 10mm Ball Socket Set of Two