All Standard, Utility Box and Service Special trailers have a front toolbox with lockable, weather-sealed doors and LED lighting that is activated with a door switch. The trailers are built on a 6" formed chassis. They ride on torsion axles with EZ Lube hubs and feature electric brakes on both axles and a breakaway safety system. The standard tires are 16" 10-ply tires with gray powder coated steel wheels. The 500 gallon model has a 5,000 lb. jack; the 750 and 990 gallon models have a 8,000 lb. jack. All are equipped with safety tow chains, an adjustable 2 5/16" ball hitch, and conduit wrapped wiring.