Plastic; Cycling accessories: the method to use is simple, don't worry it will take you too much time, cycling line protector.
Cycling line protective cover: it can prevent the frame from being scratched due to long-term wear and tear, bike supplies.
Cycling line guard: plastic bike tube protective sleeve can be used in bike tube cable or bike brake tube cable, bike tube sleeve.
Bike brake cable protective cover: with small size and simple appearance, it will not affect the beauty of the bike, bike tube cover.
Bike line guard: and materials ensure its durability and practicality, bike brake cable sleeve

What's in the box
10 x Bike Tube Protective Guard for Brake