These heavy-duty, polypropylene storage bins provide an open hopper front and back, allowing double access to stored parts. Bins stack one on top of the other, both vertically and cross-wise, and nest when empty for space efficiency. Optional dividers may be used front to back, side to side, or both at the same time, dividing the bin into the four sections. A molded in label holder on both the front and back of the bin, allows for easy parts identification. Bins can be used on standard metal or wire shelving as well as on desks, bench tops or work stations.