With more than 10 years of continuously research and testing ,we have worked out some stable formulas like :ceramic ,low-metal,NAO and semi-metallic successfully to fit Various terrain and road condition.the main composition of semi-metallic is made of steel fiber , which have high braking temperature and conduction of heat ,usually using for microthermal climate region.main features is :low dust,wear resistant to 30000-50000kms,stable braking performance. The main composition of ceramic is made of ceramic fibre ,carbon fibre,minal fibre instead of steel fibre.their main braking characteristics is rarely low dust or no dust,smooth and comfortable braking,no noise,service life can reach to 50000-80000kms.due to no steel fibre and copper inside, so it can be called ECO-FRIENDLY formula.