fiberglass net backing disc, for making flap disc, to match ISO standard Types and dimensions(According to ISO15635: ... ,23454,611522.23454.614022,23454,617022,23454,6 Product description: Type:T27(Flat) ,T29(Convex)Material: Fiberglass fabric impregnated with phenolic ... ,170mm, 178mmApplications: Used as the backing pads of Flap Disc,Mop Disc and Flap Wheel.Shipment: by 20 feet ocean container. key ...