TC6646OA, This 675 Gallon Containment Basin offered by Chemtainer industries is one of the best secondary containment systems available. The large size of this containment basin means that it can handle larger tanks and will protect you from costly environmental fines and penalities if a spill was to occur. This containment basin has been UV stabilized for out door usage and features superior chemical and impact resistance. The basin is 66 inches in diameter with a height of 46 inches. Call us today if you need custom fittings installed.