Resin Semi-Metallic Disc Brake Pads with aluminum disc brake backing plate have 40% better wear resistance. With Resin Semi-Metallic Disc Brake Pads, braking forces are generated smoothly. Thanks to this, the braking process is quiet. If your braking is quiet, then you can focus on controlling the other parts of the bike. This brake pad model designed for dry and wet conditions. 4 Pairs for 4 Calipers.