Want an effective storage solution for smaller items. The choice is clear. This Luxor Double-Row Mobile Bin System comes with 16 3 inch-deep polypropylene tubs. Clear plastic bins add convenience by making it possible to see the contents without opening the drawers. Each tub is capable of holding up to 20 lbs., making this system great for storing small but heavier items like classroom supplies, garage tools and parts, or other daily essentials. A steel frame, sturdy guide rails and a built-in safety feature keep bins securely in place while using the bins or moving the unit. And its easy to maneuver thanks to four rolling casters, two with foot-activated brakes. If your storage needs change over time, you have the option to replace two 3 inch bins with one 6 inch bin (additional bin kits sold separately).