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fiberglass discs It is punched from fiberglass cloth for grinding wheel which coated with phenolic and epoxy resin .when necessary , coating with non-woven fabric .black paper and PE It is the best base material for resin bond grinding wheel with the features of high tensile strength and deflection resistance, it is nice performance to link up with abrasive,meanwhile,it is the features of excellent high-speed cutting resistance and heat resistance. Specification: 5 density per inch: CNG160-5*5 CNG210-5*5 CNG260-5*5 CNG320-5*4 CNG330-5*5 CNG380-5*4 6/7 density per inch: CNG190-6*6 CNG230-6*6 CNG145-7*7 8 density per inch: CNP260-8*8 CNP330-8*8 CNP420-8*8 9 density per inch: C(E)NP250-9*9 CNP275-9*9 C(E)NP300-9*9 10 density per inch: CNG65-10*10 CNG90-10*10 CNG330-10*10 11/18 density per inch: CNP260-11*11 C(E)NP330-11*11 CNP180-18*18 14/19/20 density per inch: CNP56-14*14 CNG85-14*14 CNG125-14*14 CNP145-14*14 ENP105-19*19 ENP210-20*20 Expression of specificationcompositionmeshstructureweight-warp*weft/OD*ID+surfanceCNG190-6*6/396*33+VW Taking CNG190-6*6/396*33V+W for example: Expression of the cloth same as above OD :outside diameter is 396 ID: Inside diameter is 33 surface : V+W means coated with non woven fabric +wax paper W means plain + wax paper :P means coated with black paper . PE means +PE as separator; B means black color