a kind of backing for making flap disc,fiberglass backing,fiberglass backing plate,backing pad,polishing pad backing Types and dimensions(According to ISO15635:2001): d±3 /mmH+0,16min mmF min, mm9516.035.54.610522,23454,611522.23454.614022,23454,617022,23454,6 Product description: Type:T27(Flat) ,T29(Convex)Material: Fiberglass fabric impregnated with phenolic resinWasher: 1 or 2 or as ...