1.Aluminum Alloy Material - Suitable for most bicycles, Such as road bike, mountain bike, fat bike, etc. (Kids' bike and Trek Verve can not be used,Please note: do not carry children directly ). Come with tools and installation instruction, Easy to install. The Rack body is adjustable in size.<br> 2.Dimension - Shelf Length 55 cm, Width 14.5 cm; Panel Length 35.5 cm; Width 14.5 cm. (Seat Tube Diameter 2.2-3.3 cm / 0.85-1.3') adjustable for kinds of bikes. Easy to Mount.It is perfect for use with panniers, backpacks, baskets, and more<br> 3.[UNPACK] - 1 Rack Body, 6 Support Bar, 7 Screws, 2 Rubber Gasket, 2 Form Gasket, 1 Reflector, 1 Install Instruction, 1 set Installation tool ,1 Keychain NOTE: Come with the installation tool if not received please us reissue<br> 4.[Convenient and Safety]It is easy to install and cooperate with hexagon screw driver. Simple operation, you can quickly install the rack. At the same time, there is a red rear reflector lamp at the tail, which can ensure your riding at night.<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store