Containment Trays keep materials separated and confine spills to prevent damage to items store on lower shelves or adjacent compartments. One 30" x 24" tray fits between each section of leg posts on a DuraShelf shelving unit. Available with OSHA-designated color coding: blue for HealthHazards/Toxins, red for Flammables, white for Contact Hazards, and yellow for Reactives/Oxidizers. Plain black coloring available for general storage. Has a 2.5 gallon capacity.