... certification More than 10 years export experience High quality polishing tools for glass polish Description: BK glass polishing ... Australia, Egypt, Kuwait, Iran, Indonesia, Korea, Japan Company Established in 1998, Zhengzhou Longda Abrasives Co., Ltd is a ... Our target: Advanced technology is the basis of high-quality products Specification(mm): NameOuter DiameterThicknessInner Diameter BK SERIES ...