Product information:

Material: Alloy
Color: A black (10CM aluminum alloy tube),B red (10CM aluminum alloy tube),C blue (10CM aluminum alloy tube),D black (10CM carbon fiber tube),E red (10CM carbon fiber tube),F blue ( 10CM carbon fiber tube),G black (20CM aluminum alloy tube),H red (20CM aluminum alloy tube),I blue (20CM aluminum alloy tube),J black (20CM carbon fiber tube),K red (20CM carbon fiber tube),L Blue (20CM carbon fiber tube)

Packing list:

Bicycle extension*1