HAY's Color Crate wheels set transforms your Color Crate containers into a handy mobile storage unit for your home office, bedroom, kitchen or hallway – the possibilities are endless. The wheels fit Color Crate boxes made of recycled plastic: L size fits the large-sized box. The set includes four wheels. The Color Crates are characterized by functional design, industrial esthetics and a wide range of delicious colors. The compact, stackable containers are great for storing all types of items from toys to office supplies, and their airy, perforated design makes them perfect for food and bathroom accessories, too.