The MTB Bike brake pads are made of rubber and stainless steel, which can effectively improve the braking performance. The rubber with grooves provides intense frictional tense, and excellent performance for both dry and wet conditions, especially with drainage and sand grain design, can strengthen the resilience of bad weather and road conditions. It can effectively protect the wheel rim from scraping. Hope you will enjoy your riding. Features: 1. Made of rubber and stainless steel, durable and non-slip. 2. Stick to a screw, easy to install. 3. Rubber with grooves provides intense frictional force. 4. Specially designed for V brake 5. Reduce squeal when braking, won't hurt the rim. Can endure consistent jolts and bumps. Specification: Material: Rubber and Stainless Steel Color: Black, Red, Blue, Red and Black, Blue and Black Size: 70mm Package Included: 1 pair * Brake Pads Note: 1. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please in kind prevail.