... effiency Long service tim BDK engraving glass polish wheel for CNC machine Specification(mm): NameOuter DiameterThicknessInner Diameter glass grooving SERIES2004,6,8,10,15 ... ,15,2022,90 Machine semi-automatic glass engraving machine and CNC-machine UsageIt is mainly used in grooving mirror, furniture glass, glass bottle, crystal glass etc. shapes U ...