Free combination, each basket can be used alone or stacked on top of another, for flexible storage. Especially suitable for vegetable storage, fruit stand potato onion storage. With 4 wheels, can be moved around conveniently, to help you move the rolling basket to wherever you want. Made of high-quality durable iron material, anti-rust, this functional metal storage basket will meet your long term storage needs. Sloping panels and open basket designs maximize airflow, prevent rot and maintain maturity. Suitable for various storing and organizing needs, kitchen, bathroom, office, bedrooms, laundry rooms, craft rooms, playrooms and so on. Package list: 1 storage rack, 4 wheels, 1 wrench, 1 instruction manual. Please allow 1-2cm error due to manual measurement. Thanks for your understanding. Monitors are not calibrated the same, item colour displayed in photos may be showing slightly different from the real object.