Popular quality fiberglass backing for making flap disc. backing pad/fiberglass backing/backing pads/flap disc backing Types and dimensions(According ... )mm,140mm,170mm, 178mmApplications: Used as the backing pads of Flap Disc,Mop Disc and Flap ... 20 feet ocean container.Key words:Backing pads, fiberglass net backing, fiberglass backing, flap disc backing Fiberglass backing plate for flap disc making