... the backing pads of Flap Disc,Mop Disc and Flap Wheel. Product description:Type:T27(Flat) ,T29(Convex)Material: Fiberglass fabric impregnated ... )mm,115(117)mm,140mm,170mm, 178mmApplications: Used as the backing pads of Flap Disc,Mop Disc and Flap Wheel.Shipment ... the package is carton boxes directly into container without pallets. Fiberglass Net Backing Plate / flap disc