1Specification: 1.6Oz. 39" X 5Y Fiberglass Chopped Strand Mat. 2 Product:Fiberglass Mat is the most commonly used reinforcement in composites,Chopped Strand Mat is randomly dispersed fiber mat that has equal strength in every direction. 3 Features: Hand Layup, Vacuum Bagging or Molding Composites with Epoxy, Polyester or Vinyl Ester Resins. 4 Widely used: Powder short cut raw silk felt suitable for hand paste, winding, molding, continuous plate making process. can be used to produce yachts, bathroom complete sets of equipment, auto parts, chemical anticorrosion pipes, storage tanks and other products. 5 Tip: We often fold pre cut materials in the production process, folding does not damage the glass fiber. Glass fiber is very flexible, very tough!!! Anyone with experience will agree that this allows us to maintain competitive market prices while maintaining high quality product quality.