Features: brand new and high quality The backpack trolley is-made of high-quality aluminum alloy material, strong and durable. 43/66/90cm, 3 levels of height adjustment, one-click stretch. The trolley is-ideal for kid school bags. The foldable trolley cart for school bags is-ideal for children school bag. 6 wheels roll on the stairs fluently, saving energy. Whether on level ground or stairs. Effectively free the shoulders and spine of children. An ideal-gift for children, the stylish-backpack trolley is-perfect for travel, school and excursions. Specifications: Material: Aluminum Alloy Size: approx 43x27x19cm/16.93x10.63x7.48''(foldable) Type: 6-wheel crystal-wheel dark blue/6-wheel crystal-wheel rose red/6-wheel blue rubber wheel/6-wheel tricolor-wheel rose red/6-wheel crystal-wheel blue Note: Please allow 1-2cm errors due to manual measurement. Due to the difference betweeen different monitors,the pic may not reflect the actual color of the item. Package includes: 1x Backpack Trolley