1.Good resistance 2.Small tolorence 3.Raw material from Australia, Germany, China 4.Competitive price 5.Many sizes available Alumina Ceramic FerruleMullite Ceramic FerruleZirconia Ceramic FerruleFeatures:1. Good resistance2. Small tolorence3. Raw material from Australia, Germany, China4. Competitive price & Best quality5. Many sizes available 6. Certificates: SGS, ISO Toho Ceramic Technology Co., ...