... .Well insulated,low maintenance 4.25mm,mould grating Light Weight FRP Mould Grid The FRP mould grid ... on. The weight of grid itself is very light,its specific gravity is 1/4 as to ... of good performance, resist to wear out.2. Light weight,high strength, bludgon to resist.3. Longevity ... ect..And stair tread, ditch cover, trestle pavement, pool grating.2. The special situation of flammable and explosive, ...