... A/GC ceramic/vitrified grinding wheel 1.toughtness,longlife durability,35m/s 2.first grade material GC,60# 80#120#,etc WA/A ... brittle, it is made of first grade material A/WA/GC2.it s grain edges are sharp and ... and non-ferrous metal and non metal materials,etc4,a serious of sizes,according to your request, and can ... 2YcodeGHJKLMNPQRST this hole can be made flat . WA/A/GC ceramic/vitrified grinding wheel