More capacity for storage or refuse collection. Square shape offers up to 14% more capacity than round containers. Nesting handles allow secure fit for side-by-side use. Rounded corners and smooth contours are easy to clean. Gray and White are USDA Meat & Poultry Equipment Group Listed and assist in complying with HACCP guidelines. Certified to NSF Std. #2 (gray and white) and Std. Snap-Lock® Lid introduces the ability to collect, transport and ship regulated waste in the same container. Casters on optional dolly #6455 are non-marking. #6429 holds a variety of cleaning supplies and equipment. Durable nylon reinforced vinyl is strong and easy to keep clean. Twelve pockets of various sizes to accommodate most cleaning supplies. Lids sold separately.