Camco Telescopic Stacking Jacks help to safely stabilize your trailer. Featuring a zinc-plated inner tube and screw assembly, the telescopic jack is adjustable from 16" to 30" with a 6, 000-lb. load capacity. The jacks are constructed of steel, painted black, and electronic deposition coated for maximum rust protection. Quick and easy pull pin design with stable foot pads. Comes in a set of 2. Adjustable from 16"" to 30"" with a 6, 000-lb. load capacity Quick & easy pull-pin design | Camco Telescopic Stacking Jacks, Set of 2