bean grind grinding wheel diameter: 120-350mm aluminium oxide material Product Discription ... MC1I J K LM N O PM N O PL M N O NC2 PCT1 Q R S TU V W ... finishingF120,F150,F180,F220,F230,F240,F280,F320,F360,F400Precision Grind, Honing and Tread GrindingF500,F600,F800,F1000,F1200Mirror finish grinding ...