A simple way to level vehicles by giving a tire up to 4 extra inches of lift. The honeycomb design makes the leveler lightweight but durable. The drive-on curved design allows you to only drive onto as much height as needed, then chock the leveler at the exact right height. The included wheel chock has non-slip rubber grippers on the bottom and built-in handle. They are designed to be used with single and multi-axle trailers and RV's that weigh up to 30,000 Lbs. Use one curved leveler kit per axle. Works with tires up to 32 In. in diameter. No. 44423: Load Capacity: 30,000 Lb., Pkg Qty: 1, Package Type: Box Thanks for shopping Hipp Hardware Plus's Online Store for all your DIY and Home Improvement needs. Remember Hipps Help!