Heavy-duty, noncorroding cast Aluminum Jack Stands from Camco will be your new best friend when it comes to stabilizing and leveling your RV. Steel screws and a permanent handle adjusts from 11 to 17. Each stand supports up to 6,000 lbs. Available: Per 2, Per 4. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Size: JACK STANDS PER 4. Type: Stabilization Accessories.