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