This Firestone air tank provides a source of compressed air for an air spring system. Tank has 3-gallon capacity, (3) 1/4 in. NPT ports and (1) 1/8 port. Tank is enamel coated, tested to be SAE J10 compliant and capable of 150 psi. Features: Provides compressed air source for an air helper spring system Allows for faster inflation of air springs Holds 3 gallons of compressed air Includes (3) 1/4 in. and (1) 1/8 in. NPT ports Steel tank with brass fittings Resists corrosion with internal and external enamel coating Is SAE J10 compliant Operates at up to 150 psi of maximum pressure Specs: Tank dimensions: 20.75 in. long x 7 in. diameter Tank capacity: 3 gallons Inflation ports: 1/4 in. and 1/8 in. NPT PSI: Maximum of 150 2-Year limited warranty