Main Features: Materials: sintered copper, Organic ,ceramic friction coefficient reach to 0.55 ,high stopping power. Noise under 75 DB Long lifespan 12000kms Formula are made of green organic mineral FIBRE Eco-friendly High abrasive resistance Low abrasive interaction with brake rotor material Offering high durability green sintered metal product avoid the contamination bye mud, sand, grit and water. material:sintered skin packing,vacuum packing,box.