AR Fiberglass C-Class Chop Strand B-grade from Owenscorning, 3mm~50mm FRP plastic; concrete, manhole, gypsum board AR Fiberglass C-Class Chop StrandFiber length: ... 3mm 4.5mm 6m 12mm 18mmFiber: E-glassUsage:FRP fiberglass reinforcded plastic, PP ... boardQuality is B grade, raw material is from Owenscorning AR Fiberglass C-Class Chop Strand