All-Plastic, Professional-Grade Construction Will Not Rust, Chip Or Peel And Resists Dents. 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. USDA Meat & Poultry Equipment Group Listed, Assists In Complying With HACCP Guidelines. Certified To NSF Std. #2 And Std. #21. CSFM Approved When Used As Container/Lid Combo (2632/2637, 2643/2647, 2655/2657; Lids And Dollies Sold Separately).