Akro-Mils industry leading 4 in tall shelf Bins are constructed of durable industrial grade plastic and provide a neat and attractive storage solution. The superior construction of these affordable plastic storage bins allows them to be fully loaded without bulging or cracking and multiple divider slots allow for a greater number of storage options. Akro-Mils shelf bins are a superior alternative to weak and flimsy cardboard bins. 12, 18 and 24 in deep bins work with standard wire or steel shelving. One-piece construction is waterproof and unaffected by grease or oil. Works in temperatures down to -20 deg F. Make the most of your shelf bins with optional bin cups which subdivide bins and lift out easily for transport.