Description: Brake pads are the most important safety components for , and they plays a decisive role in brake process. A set of efficient braking system must be able to provide a stable, sufficient and controllable brake force as well as a good heat dissipation capacity, to avoid braking failure caused by too much heat. This is a must-have item for build a or repair your old bike.Specifications: Color: BlackMaterial: Resin, copper particle, yellow friction material Pad Size: 3.3 x 2.8 x 2.3cm / 1.3 x 1.1 x 0.9Thickness: 0.4cm / 0.15 Circlip Size: 3.1 x 1.5cm / 1.22 x 0.59Quantity: 4 pairs Weight: 97g(approx.)Package Includes: 4 Pairs x Brake PadsNote: 1, Brake discs and pads need to replaced with new ones if there are black friction mark on disc surface and it cannot lock timely, or it give out a sharp sound when braking. 2, Please allow 1-3mm error due to manual measurement. Thanks for your understanding.3, Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.