(Mfg. 03/2009), DOT406AL, Aluminum Construction, 5,340 Gallon Capacity, 3-Compartment (2120, 1100, 2120), "Y" Bottom Load Heads w/ Brake Interlocks & Sight Glasses, Dual Vapor Recoveries w/ Brake Interlocks, Optics Socket w/ Brake Interlock, Air Ride Suspension, Disc Brakes, 455/55R22.5 Super Single Tires on Aluminum Wheels, R/H Side Hose Tray, Aluminum Ladder @ Rear of Trailer...