[Featured Materials] Brake pads mountain bikes are made of semi-metallic materials, which can maximize the initial bite force, enhance the waterproof effect, wet and sunny braking effect as well. Bicycle brake pads for convenient and timely replacement and longer service time.These disc brake pads are without , iron and harmful substances, good heat resistance, easy to install. [Less Noise] Semi-metallic bike brake pads high performance braking power and comfort stop, good anti-Noise ability and offer better modulation.Can minimize the initial bite time, shorten the run-in period, reduce the noise fast smooth road, suitable for smooth road riding. [Comfortable and Durable] Bicycle disc brake pads with low disk wear and comfortable braking feel and stable, choose the right brake pads for mountain, trail, downhill, cycling... [Multiple Matches] Suitable for most brake bicycles, compatible with for Avid Elixir E1 E3 E5 E7 E9 R ER CR CR VIA GT X7 X9 Sram XX World Cup XO DB1 DB3 DB5 Shimano BS-01S M355 M395 M446 M485 M495. Colour: black Material: semi-metal Size: 32.2 x 29.8mm Package Contents: 4 Pair x brake pads 4 x Spring 4 x Latch Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.