The MD Series slide-in from TruckXpress is made of high-strength carbon steel and comes in a variety of sizes. They include the MD 300, 400, 450 and 650, with custom sizes also available. Each tank can be bolted onto any truck frame with a 4,000-pound payload capacity. They come with 3-inch waste and 2-inch freshwater outlet valves, and clean and graywater reservoirs with sight glasses. They also include an internal baffle system that helps eliminate front-to-back and side-to-side sloshing, resulting in better cornering and stopping. A Honda 5.5 hp Conde 6 vacuum system is the standard pump system, with a vacuum gauge mounted on the vacuum system platform. It has a 25-foot service hose with 1/2-inch metal hose standoff to protect the paint, with a rack for the service hose. 800-328-3332; www.satellitetruckxpress.com.