SUSPA Spring Strut Prop Shock C16-08941 One Pair 28# 16", Force for One Prop is 28lbs and Force per Pair is 56lbs Compressed Length (Center-to-Center): 9.4 in (239mm) Extended Length (Center-to-Center): 15.7 in (399mm) Force: 28 Lbs (125 N) (Per Prop) End Fittings: 10mm Nylon Ball Sockets Set of Two