MORE Gas springs listed in our
Store Fully extended= 17 1/4 inches ... Fully retracted = 10 1/4 inches (center to center of the ball socket) Diameter: rod = 6 mm / tube = 15 mm 20 pound force at rest (full extension) You are buying (1) gas spring / shock / strut Manufactured by Columbia Strut (CS1720-20) this unit is totally self-contained, hermetically-sealed, a hydro pneumatic linear actuator containing pressurized nitrogen gas, which provides the output force. This unit and comes complete with threaded removable 10mm nylon ball sockets both on the rod and tube ends (if you are in need of mounting brackets see our selection listed in the store) The shipping, handling and insurance is a set cost of $12.00 (FedEx to the Lower 48 states USA ONLY) and Handling to all other parts of the world please e-mail us for a price quote and to be sure we can ship to your location. Note: for best results replace both struts (when 2 struts are used) ALWAYS install with rod down (your struts will last much longer here s the reason all struts contain a bit of oil / that is what causes the damping effect towards the end of the stroke , this oil also lubricates the piston, installing the rod down keeps the oil atop the piston!) If you do not find the size, length or configuration you are in need of please e-mail us as we have over 100 combinations to choose from Thank-you for your interest Watch for MORE items from RV-Trader to come!