DC-905000-1.9, Duracast 5000 Gallon Heavy Duty Vertical Tank | 905000 Need to find a container that is strong enough to handle corrosive chemicals? With Duracast’s heavy duty vertical tanks, you can enjoy worry-free storage for all kinds of contents ranging from industrial chemicals to biodiesel. Along with being able to resist chemicals well, these tanks can also combat physical attack. Whether it is stormy weather, frigid temperatures or harsh UV rays, these tanks will not break down easily. The polyethylene resin is compounded with UV stabilizers to extend the life of the tanks. To keep them from cracking, these tanks are built to have excellent low temperature impact strength. Gallon calibrations are molded into the tank so you can quickly measure content levels. This is a 1.9 specific gravity tank.