... /SheetWe are one of the manufacturers of perforated metal sheet screen,square hole perforated wire mesh and perforated ... , stainless steel, aluminum steel, plywood, hipboard, density board, plastic film, etc.Hole shapes:Round, rectangular, square, triangle, hexagonal, diamond, ... in loudspeaker etc. Specify the thickness of the sheet, length of perforated metal sheets, size and shape of the perforation ...