Round Staggered Perforated Metal S.S,Aluminum,Plain Steel,Brass plate ... steel perforated metal screen; galvanized iron perforated metal screen; aluminum perforated metal screen; stainless steel perforated metal screen; perforated metal sheets ... engineering, sifting of grains, decorations and designs of buildings.Perforation patterns Round perforations, square perforations, slotted perforations, fish ...