Storage & transport space & costs are minimized (stack 20 units per pallet), Modular design makes product easy to assemble,store & handle, Products are environmentally - friendly and affordable, Meets / Exceeds all N.A. regulations, "Unique spill containment sump design allows for efficient ‘stacking or nesting' that provides for efficient,low cost storage,handling and transportation. Low profile sump design with strong removable platform for ease of use. ", ORDER ONLINE HERE,