1/2 in. Male NPT Tank And 1-1/4 in. Female NPT Air Purger, 11 in. Diameter, 15-1/2 in. Height, 4.4 Gallon Volume, 2.5 Gallon Minimum Acceptance Volume, 16.6 lb., Includes TK300-30, AP401, FV180, SCV-0125, SCV-050, And FM911.