DC-901600-1.9, Duracast 1550 Gallon Heavy Duty Vertical Tank | 901600 These heavy duty tanks are the ultimate storage solution when you are dealing with damaging contents and stressful environments. Designed to hold contents safely without cracking or leaking, these tanks provide worry-free storage. The one-piece structure eliminates the need for seams or joints, making these tanks an overall stronger container. These tanks are rust-resistant to extend their lives and keep them in good working condition for years. They are also highly resistant to chemical attack, which means you can use these tanks to store even the most aggressive chemicals. People often use these tanks for producing chemicals and for industrial and manufacturing purposes. This is a 1.9 specific gravity tank.