Suspa C16-10788 C1610788, 12" Gas Prop, Quantity (2), Force is 35 Lbs per prop and Force per set is 70 Lbs,&nbsp; Suspa recommends to replace both struts at the same time, Camper Rear Window, Tonneau Cover Lift Supports, Window Lift Support, Struts, Made in USA Compressed Length (Center-to-Center): 8.3in (211mm) Extended Length (Center-to-Center): 12.2in (310mm) Force: 35 Lbs (156 N) (Per Prop) End Fittings: 10mm Nylon Ball Sockets Set of Two