Restroom delivery trailers from Liquid Waste Industries are made from heavy-duty steel and have double torsion axles, electric brakes and flush-mounted lights. Available with or without 4-foot side rails, trailers have built-in winch straps on all corners and a T-beam down the middle to secure one side of the skid. Hooks are evenly spaced along the sides to weave through and over skids on trailers without sides. Trailers are 24 inches high for easy loading and unloading. Custom upgrades include gates, leaf spring axles, fold-down ramps, LED lights and choice of hitches. 877/445-5511; www.lwiinc.com.