2pcs M6*65mm Aluminium Alloy Bicycle Seat Post Quick Release Pin Seatpost Skewer Bolt Yellow Aluminum Rail Connector USB Rechargeable: Built-in 1200mAh battery

USB Rechargeable: Built-in 1200mAh battery provides portable power without affecting driving visibility

Easy to install: Easy to install universal elastic net

The belt is made of soft nylon fabric

and can be stored for a long time

After attaching the swivel

2pcs M6*65mm Aluminium Alloy Bicycle Seat Post Quick Release Pin Seatpost Skewer Bolt Yellow Aluminum Rail Connector USB Rechargeable: Built-in 1200mAh batteryMaterial: Aluminum alloy, durable, rust resistant, and convenient for adjusting seat height. Dimensions: Approximately 6. 5cm in diameter, 6mm in diameter, and approximately 13. 2cm in total length (measured manually, subject to variations). Advantages: Extended quick release rod for mountain bike rack mounting. Suitable for bicycles without holes. When mounting a rack on a mountain bike, you'll find that the rack lacks the two front mounting holes.