DescriptionDual compound structure improves stopping power. Made of hard-wearing material. Minimizes rim wear and reduces braking noise. The long and curveddesign matches the rim for improved braking power. Fits most bikes, like mountainbike, city bike, folding bike.Features- Material: Rubber, Metal - Drainage tank design to strengthen the rain road slippery and other bad weather. - Unique grooves design can endure consistent jolts and bumps to provide excellent braking ability. - Angled tip and grooves sweep dirt, mud and moisture from rim. - Dual compound structure improves stopping power. It will give you a good experience. - Exquisite workmanship, reasonable structure, professional and practical, can bring you convenience.