This air tank boasts a 150 PSI working pressure and meets all SAE J10B specifications. With a 1488 cubic inch capacity (6.44 gallons) and all ports being NPT, it fits most makes and models. The tank features a 9.5 inch diameter and measures 27.50 inches in length. The main port is 1/2 inch with an additional 1/2 inch port opposite of the shown port. The drain port is 1/4 inch and the end port is 3/8 inch. This air tank is sold individually and is a practical and reliable choice for any air system.