Vertical Storage Tanks 550 gallon... 12 gauge... 48" dia.x6'6" O.A.H. 1000 gallon... 10 gauge... 64" dia.x6'6" O.A.H. 1500 gallon... 7 gauge... 64" dia.x9'6" O.A.H. 2000 gallon... 7 gauge... 64" dia.x12'6" O.A.H. 3000 gallon... 7 gauge... 80" dia.x12'6" O.A.H. 4000 gallon... 7 gauge... 90" dia.x12'6" O.A.H. Standard fittings 3-2" and 2-1/2". Also available - 18" Bolted Manhole