Compressed Length (Center-to-Center): 6.7in (170mm) Extended Length (Center-to-Center): 9.8in (249mm) Force: 40 Lbs (178 N) (Per Prop) End Fittings: 10mm Nylon Ball Sockets Set of Two Commonly found on windows, tonneau covers, truck caps, hatchbacks, rear doors, trailers, boats, and floor safes. Model C16-09322 - sold as one pair