Waterproof, rustproof, and weak alkali/acid resistant.Features - Molded from industrial-grade polymers - Securely stacks atop one another - Reinforced side ribs - Extra-wide stacking ledges - Large label area - 1/EachRelated Products: AkroBins Length Dividers, Flush Polyethylene Dolly w/ Casters, VERSA/Deck Style "A" Platform Trucks