AR Fiberglass C-Class Chop Strand B-grade from Owenscorning, 3mm~50mm FRP plastic; concrete, manhole, gypsum board AR Fiberglass C-Class Chop StrandFiber ... BMC2. reinforce concrete, cement, manhole, gypsum board, plaster boardQuality is B grade, raw material is from Owenscorning AR Fiberglass C ...