Product Description materials: copper fibers and resin. Is low noise and offers better heat dissipation and abrasion resistance.Excellent Braking Power: Bicycle brake pads provide flexible and powerful braking on flat roads and high-speed roads.Safe and Reliable: Even if the brakes are continuously applied at high temperatures, the brake pads on the bike are not easily twisted or deformed, and Maximum performance and stability in the dry or wet environment.Compatible with many models:These disc brake pads are suitable for different brake systems: Shimano M315, M355, M515, M515-LA-M, M525. Nexave C501, C601, M375, M395, M415, M416, M446, M465, M475, M485, M486 etc.The package includes: a set of 4 pairs of semi-metallic copper bicycle brake pads (each pair is equipped with 2 pads, 1 metal lock, 1 metal chip), suitable for quick replacement and longer service life.Package Content: 4 pairs brake pads Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.