Title:Metal Coated Mesh Speaker Grill stainless steel, Galvanized Iron, Aluminum Hole: square,round,diamond, Hexagon ... , 201,303,316, etc), Copper, Silicon steel plate, Aluminum, nickel, Magnetic material and so on.The main technologies include Precise etching ... , electroforming and electroplating and so on. Metal Coated Mesh Speaker Grill Metal And Nonmetal Coated Mesh Speaker ...