These quality hopper bins feature a wide front opening for easy access, and 1 rear and 2 side grip handles. They're made of durable, easy-to-clean polypropylene that resists rust, corrosion and most chemicals so they're excellent for a variety of storage applications. FDA Compliant Resin & Colorant. Hopper bins stack 6 high. Sold in carton quantities - 2 bins per carton of 1 color. Please enter a multiple of 2 in the QTY box for each unit ordered.