[Featured Materials] Brake pads for mountain bikes are made of semi-metallic materials, which provide strong initial bite force, enhanced waterproof performance, and consistent braking in both wet and dry conditions. These bicycle brake pads allow for convenient and timely replacement and offer extended service life. The disc brake pads are free of iron and harmful substances, feature good heat resistance, and are easy to install. [Less Noise] Semi-metallic bike brake pads deliver high-performance braking power and smooth, comfortable stops. They offer excellent noise reduction and improved modulation. These pads minimize initial bite time, shorten the break-in period, and reduce noise for quiet operation on smooth roads, making them ideal for smooth road riding. [Comfortable and Durable] Bicycle disc brake pads provide low rotor wear, comfortable braking feel, and stable performance. Suitable for mountain, trail, and downhill cycling. [Multiple Compatibility] Compatible with most disc brake systems, including Avid Elixir E1, E3, E5, E7, E9, R, ER, CR, Mag, VIA, GT, X7, X9; SRAM XX World Cup, XO, DB1, DB3, DB5; Shimano BS-01S, M355, M395, M446, M485, M495. Color: Black Material: Semi-metallic Size: 32.2 x 29.8mm Package Contents: 4 pairs x Brake pads 4 x Springs 4 x Latches Note: Light shooting and different displays may cause the color of the item in the picture to appear slightly different from the actual product. Measurement allows an error of +/- 1-3cm.