This is the Norwesco PCO Tank - 100 Gallon (Ribbed Side Wall). A multi-purpose tank, the PCO is well suited for nursery, agricultural and lawn care applications. These tanks feature self-supporting legs and do not require any saddles or steel supports. Flat spots are molded into both ends to provide mounting areas for agitation equipment. Our Norweso PCO Tanks are constructed with a UV stabilized resin and a specific gravity rating of 1.5 (12.5 lbs per gallon).