Husky, the leader of the portable containment pack, is proud to release its folding frame tank liner designed for maximum holding capacity: the PRO500. This liner was designed with four state-of-the-art, specially designed “bladders” infused into its side walls – two on each folding side – offering an additional 500 gallons of much-needed holding capacity. The bladders, which conveniently extend out from the frame, are quickly and easily deployed when needed