fiberglass chopped strands for concrete, B-grade from Owenscorning, 3mm~50mm, FRP plastic, PP BMC; manhole, gypsum board, fiberglass chopped strands for concreteFiber length: 3mm 4 ... , PP PA BMC2. reinforce concrete, cement, manhole, gypsum board, plaster boardQuality is B grade, raw material is from Owenscorning fiberglass chopped strands for concrete