Description:Brake pads are the most important safety components for bicycles, 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 bike or repair your old bike. Features:Made of resin and copper particle, light weight and convenient to install. It will need less time for mechanical running-in, prevent heat accumulation.Resin pad with low noise and excellent power modulation. There brake pads have direct and sensitive reaction, suitable for normal ride.Smooth and powerful braking, less harsh noise, good performance.Suitable for M446brake or other brakes of same shape and size.Specifications:Color: BlackMaterial: Resin, copper particle, yellow friction materialPad Size: 3.5 x 3 x 1.5cm / 1.37 x 1.18 x 0.59"Thickness: 0.4cm / 0.15"Circlip Size: 3.1 x 2.5cm / 1.22 x 0.98"Quantity: 4 pairsWeight: 118g(approx.)Package Includes:4 Pairs x Brake PadsNote:1, Brakediscs 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 asharp 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.