Perfect for 5-S
Your review: These are very strong and light weight. I filled one with loose sprockets and it remained very solid when handling and stacking. These are just what I needed for organizing my shop and they fit my shelves. Perfect for organizing and protecting the gamut from loose sprockets to PLCs and relays.
Pros: Tough, strong, high weight capacity. Awesome industrial gray color.
Cons: Deep structural ribbing on ends loses some volume (but makes stacking stronger).