Perforated metal: Material:Stainless steel plate.aluminium ld-hot steel plate,copper plate ,PVC coated plate Shape:Slot, square ,round( mainly used in filter production), hexagonal ,scale, tensilc shaped hole, diamond ,triangle, cross plum blossom Use :Used widely in road railway civil building, water conservancy’s build ;the protecting of all kinds of machines ,electrical equipment ,window and aquatic products bread.