KERA Industrial Ceramics & Grinding Mills provides several types of grinding media such as Steatite, Alumina, Zirconium, Silicon Nitride and Silica. We especially recommend YTZ (Yttrium stabilized Zirconium Oxide of producer Tosoh). This because YTZ is the very best grinding media in the world. Because of it’s hardness and abrasion resistance, this pre-cured material and rotundity alights far above all other grinding media. Of course you’ll receive Tosoh authenticity certificates with every supply of YTZ.