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By certification 
Fiberglass Disc is the basal material of Resin- Bonded Abrasive Wheel. It is baked and punched from Fiberglass mesh cloth coated with phenolics and epoxy resin.
Fibreglass Discs can be available together with black paper or/and wax paper.
Available Sizes: 4", 4.5", 5", 6", 7", 9", 12", 14", 16"
Resin content: 36% +/_4
Volatile: 3% +/_2
