Title:Metal Coated Mesh Speaker Grill stainless steel, Galvanized Iron, Aluminum Hole: square,round,diamond, Hexagon Title:Metal ... Coated Mesh Speaker GrillRound hole punch perforated metal stainless steel, Galvanized Iron, Al Hole: square,round,diamond, Hexagon Beautiful ... 301, 304, 430, 201,303,316, etc), Copper, Silicon steel plate, Aluminum, nickel, Magnetic material and so on.The main ...