... fiberglass backing for making premium quality flap disc or polishing pads. fiberglass backing, backing pad Types and dimensions(According to ... 117)mm,140mm,170mm, 178mmApplications: Used as the backing pads of Flap Disc,Mop Disc and Flap Wheel.Shipment: by ... 20 feet ocean container.Key words:Fiberglass backing, backing pads, fiberglass backing pad Fiberglass backing pads for premium quality flap disc