RV Gas Struts, 18 Inch 60lbs., is great for holding your cargo doors open while packing and unpacking. Also excellent for use on truck caps and RV beds. Measurements are fully extended. Does not include mounting hardware. Measurements are fully extended. 12/clamshell. This RV gas strut is Priced Each. Manufactured by BRD. 18" 60 LB Gas Strut. Measurements are fully extended. 12/clamshell.