Industry leader in waste and material handling applications. * All-plastic, professional-grade construction will not rust, chip or peel; resists dents. * Strong, snap-on lids are available for secure, stable stacking. * Reinforced rims add strength and durability. * Built-in handles allow easy, non-slip lifting and anti-jam nesting. * Double-ribbed base increases stability and dragging capacity. * Gray, White and Yellow are USDA Meat & Poultry Equipment Group Listed and assist in complying with HACCP guidelines. * Easy twist on, twist off dolly provides safe mobility. * Certified to NSF International Std. #2 (gray, white and yellow) and Std. #21. 2632/2637-88, 2643/2647-88, 2655/2657-88 are California State Fire Marshal (CSFM) approved when used as container/lid combo. * 2640 casters are non-marking.