<ul> <li>Heavy steel structure: In a single Jack in a box carton, you'll find 2 slide-out supports with the ability to stabilize up to 6,000 lbs each. The jack is adjusted between19" and 47".</li> <li>Corrosion resistance: Powder coated bases and zinc-plated channel brackets resist corrosion. <br></li> <li>Value selection: Using your camper slide out for extended periods of time can cause sagging and bending in the slide out rails which can create operation issues and costly frame repairs. Use the camper slide out supports RV leveling Jacks, 2 piece set to alleviate tension and increase stability in your travel trailer, RV, and camper slide out rooms. Heavy-duty steel and zinc finish provides maximum strength and longevity for these rust-resisting RV levelers. </li> <li>Package includes: Each package includes 2 camper jacks to add to your camper accessories for travel trailers and RV stability.</li> </ul>