These bins are constructed of extra-strong injection molded polyethylene. The hopper front allows immediate access and visibility, while ribbed reinforced walls ensure superior strength. FDA Compliant Resin & Colorant. They feature wide interlocking ledges for positive stacking. Impervious to most solvents, corrosion, rust and rot resistant. Resists temperatures from -40°F to 180°F. Includes heavy duty spread bar for extra strength and support. Label holders are molded in. Mobile Bin with Casters have a 250 lb. capacity and moves easily on 3" non-marring hard rubber swivel casters with brakes. Sold in carton quantities.