This Firestone Air Tank provides a source of compressed air for an air spring system. Tank has 20 - Gallon capacity, (6) 12 NPT Ports and (1) 14 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 20 Gallons of compressed air Includes (6) 12 in., and (1) 14 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 44 in. long x 12 in. diameter Tank capacity 19 Gallons Inflation Ports 12 in. and 14 in. NPT PSI Maximum of 150 2 - Year limited warranty