These durable industrial grade polymer bins are waterproof, and grease and oil resistant. The design features, built-in rear hang lock which allows bins to tilt out for complete access while hooking onto shelf to prevent spills. The wide hopper front, with molded-in label holder, allows complete access to contents of parts bins, and the edges are reinforced for added strength. Nests to save space when not in use. Designed to be used with standard 12", 18" and 24" deep shelving units or racks. Optional bin cups and dividers are sold separately. Bins cups sort and hold smaller parts and can be lifted out for easier access and restocking.