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 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 to all colors.