Durable, heavy-duty containers for a variety of uses. * All-plastic, professional-grade construction will not rust, chip or peel; resists dents. * Strong, snap-on lids are available for secure, stable stacking. * Gray, White and Yellow are USDA Meat & Poultry Equipment Group Listed and assist in complying with HACCP guidelines. * Certified to NSF Std. #2 (gray, white and yellow) and Std. #21.