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