Features: Upgrades your bike rack mount effortlessly with this durable Rear Shelf Connector Seatpost Adapter. Crafted from metal, this adapter ensures a secure fit without compromising its functionality. Its fashion designs adds a touch of style to your ride. Designed for cyclist who need to transport lightweight cargo in various settings, such as city areas, alleys, and commercial districts. Perfect for couriers and delivery personnel. This adapter provides a practical solution for carrying packages, food, or documents on your bike. It's suitable for different scenarios where car may not be the best choice. Experience the versatility of this Rear Shelf Connector Seatpost Adapter and simple your biking journey. Specifications: Material: Metal Size: As Shown In The Picture Package Includes: 1set bicycles Conversion Bracket note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.