High-quality aluminum alloy: strong bicycle frame, mainly made of high-quality aluminum alloy, black coating, strong and durable, very suitable for long-distance outdoor riding, (it is recommended not to carry too many items to avoid accidents) Case Protection: Protective straps on both sides of the front frame. Driving with a bag on your back can avoid the collision or friction between the bag and the wheels and driving safety Compatible with V brakes or disc brakes: suitable for mountain bikes or city bikes, road bikes, folding bikes, etc. Compatible with V brake and disc brake system Fork hole assembly: Bicycles must have fork holes. Install it into the reserved hole in the bike's fork (as shown in the picture), then install the 2 mounting rings. Compatible with bicycle fork diameters (28-34mm). EASY INSTALLATION: Even beginners can install it. Complete with accessories, screws and wrench. You can install it directly after receiving the package. size: 23 x 14 x 23 cm Material: aluminum alloy colour: black Package Contents: 1 x front shelf 1 x stand 1 x tool Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.