The Flat Vacuum Slide-In Tank from Crescent Tank Mfg. has a low-profile design with low center of gravity. It has a 350-gallon waste tank and a 150-gallon poly freshwater tank. It is a discreet design with the tank sitting at or below the sides of the pickup truck. This tank is designed to fit a 1-ton or greater 8-foot-bed pickup or flatbed. It has an empty weight of 1,280 pounds, and the overall dimensions are 96 by 48 by 56 inches. It can be custom-designed to fit specifications. The tank is constructed from 1/4-inch mild steel. 585/657-4104; www.crescenttank.com.