SF121 material is developed by Zhejiang Kote Automobile Parts Co., Ltd. belongs to the clutch friction disc of Volkswagen automobile. The company adopts high-quality glass fiber, high-quality composite material and copper as the framework material of the product in the combination of materials, thus ensuring the excellent proportion of the product in other auxiliary materials and ensuring the product. It has advantages in high temperature, wear resistance, comfort and so on. It is suitable for medium and small-sized, bus, bus and other types of vehicle series.