Disc brake pad replacement. Rigid and corrosion-resistant backing plate. Optimal heat dissipation, providing effective protection for disc brakes. Available as an upgrade and replacement pad for many different brake calipers. Smooth and compact braking, pleasant braking feel with low noise. Using the best semi-metal material, high wear resistance, effectively protecting the brake disc. Excellent for any braking system, maximum performance and durability in dry or wet environments. Material: resin and semi-metallic. Suitable for Shimano BB5, M355, M446, 785. Specification: Material: Semi-metal Color: Black Quantity: 4 pairs / 8 pieces Size: Approx. 31 * 35 * 4 mm / 1.22 * 1.37 * 0.16 inch Net weight: 24 g / pair Package included: 8 pieces bicycle disc brake pads 4 pieces screw included Note: 1. Please compare the picture with your original brake pad before purchasing. Generally, if the shape fits, then the product is suitable for your bike. 2. The surface of the new brake discs and brake pads are smooth, so that enough friction is created for braking. It may be that if you use the new brake pads together with brake discs that are a bit too old, the friction surface becomes small and then it does not work so well. Usually it gets better after you have cycled 50 km to 80 km.