This product is suitable for working under the oilless condition. It can be used under a working temperature range of -195～280℃.And it has excellent properties of friction resistance, low fraction and long life. With excellent properties of corrosion resistance, it can work in varies corrosive media (including in liquids and gases). It has characteristics of compact structure, light and small occupied volume. High mechanical strength makes it bear lager constant and dynamic load which makes machine reduce vibration and reduce noise to improve the working condition.