we are a professional fiberglass woven roving factory,we can produce E-glass and C-glass fiberglass,and now we export the produc ... we are a professional fiberglass woven roving factory,we can produce E-glass and C-glass fiberglass,and now we export the ... components, pressure tank, house, etc. Woven roving is the primary strength material used in fiberglass boatbuilding. 18 oz. per square yard ...