Warren Manufacturing of Birmingham, Ala. manufactures trailers with tank lengths of 24 feet to 40 feet with six to 10 compartments. Capacities range from 816 cubic feet to 1,880 cubic feet. Standard specifications include aluminum fabrication, galvanized running gear, air-ride suspension, automatic hydraulic flow control and a 24-foot discharge auger. Various options are available including a front delivery auger system, remote controls that spray disinfectant on wheels and vacuum feed retrieval.