Don't Spill! Zirgo™ Polished Overflow Tanks provide the extra capacity you need. Made of corrosion-resistant polished aluminum, tanks are available in 13", 15", and 17" sizes to exactly cater to your needs. The polished finish makes them great for show cars, hot, rods, and dressed up engines. For other sizing options take a look at our ZFETS Modular Overflow Tank System. Features a Limited Lifetime Warranty.