... strength, good wear-resistance, small friction coefficient, lead a longer life. The Ceramic Cleaner Cones with High strength, good wear-resistance ... , small friction coefficient, lead a longer life.The useful thickness of ceramic is bigger and surface of ... expansion~7.5 x 10 6/(rt~800)Alumina powderImported from AustraliaLife time5-10 years, depending on the actual PM Ceramic ...