Camco Olympian RV Aluminum Stack Jack Stands are designed to get secure and level RV positioning and stability. It is made from cast aluminum and can support up to 6000 lbs. These Jack Stands extend up to 17 and are easy to use. Without proper stabilization your RV will rock with any little movement. Camco s Olympian Aluminum Stack Jacks are designed to stabilize and level your RV. Made of durable cast aluminum they can support up to 6 000 lb. each and are adjustable from 11-inches to 17-inches. Easy to use simply position each stack jack underneath your RV and raise to the proper height to reach appropriate leveling and stabilization. When finished they are easy to pack up and store. The stack jacks come in a pack of (2). Model#: 44561; Color: Silver