This is a handy set of castors for the Really Useful Box company's 18 or 35 litre boxes. They are made from a strong and rigid plastic frame with 4 chunky castors on each corner.
Really Useful Boxes® are strong, stackable, and a real solution to storage problems at home or at the office. Easily keep things neat and tidy with these compact boxes from Really Useful Products, which allow you to store things with only a limited amount of space. These boxes fit together snuggly and can be stacked with ease. Made of strong polypropylene, this Really Useful Box is water-resistant and useful for archiving, filing and storage.