mono-crystalline aluminum oxide is a kind of abrasive produced by fusing calcined alumina by the bayer¡¯s process in the producing process. and then by crushing and sizing to desired grain size. mono-crystalline aluminum oxide has high hardness and unique micro fracturing containing of well grown micro crystalline structure which generates many new cutting edges. mono-crystalline aluminum oxide is suitable for a wide variety uses from gerneral grinding to precision grinding of high hardness tool steels. chemical composition(%):al2o3: 98.89-99.70% fe2o3:0.155%max sio2:0.25%max tio2:0.30%maxmagnetic material content:0.005%max we have strict control about company & quality;our service is full-around and first-class. so we¡¯re you wise choice.don¡¯t hesitate to contact us . contact person: ms. liang xiaofei(sales manager) helen(at)rs-abrasive.com tel:+86 379 65285888-0 13015581246 fax:+86 379 66285889