This product is made from material for durable and practical use. Aluminum alloy material provide strong strength. It is easy to install on standard rear racks for most bikes. It provides safety for your children. Suitable for most bikes, especially for road bike and mountain bike. Features -Color: Black. -Material: Aluminum alloy. -Size: About 39.50X37.50X13.00cm/15.52X14.74X5.11in. - Easily mount on the seat post or take the rear bike rack off, you can change the seat height easily. - Fits most of bikes like bike but not fit the rear suspension bike, soft-tailed bike, carbon fiber bike. - The bike rear rack was made with high strength aluminum alloy material, help you ride freely in rainy days or humid conditions. - Side bars effectively protect your bag from scratching by the wheel or spokes and also protect people's safety. - Perfect for caring some stuff on your trip, work , even carry the people. Package list: 1 x Bike Cargo Rack