The Camco Curved Leveller is a simple way to level your vehicle by giving a tire up to 4-in of extra lift. The honeycomb design makes the leveller lightweight but durable. The drive-on curved design allows you to only drive on to as much height as needed, then chock the leveller at the exact right height. The included chock has non-slip rubber grippers on the bottom. Patented. Camco makes quality products for RVing, boating, camping, towing, tailgating, and grilling that help you take your passion for the outdoors to the next level.