This Firestone air tank provides a source of compressed air for an air spring system. Tank has 5 - gallon capacity, (4) 14 in. NPT ports and (1) 18 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 5 gallons of compressed air Includes (4) 14 in. and (1) 18 NPT ports 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 9.5 in. diameter Tank capacity 5 gallons Inflation ports 14 in. and 18 in. NPT PSI Maximum of 150 2 - Year limited warranty