... ;1m-20m 4.Hole diameter:As your demands Perforated Metal MeshMaterial:Low carbon steel board, stainless steel board, ... copper board and nickel board.Characteristics:The surface is flat, smooth, beautiful, firm and practical. It has wide ... Mining, medicine, food selection, indoor noise, silencers and grain storage ventilation, mechanical protectionHole patterns:Round, Rectangular hole, square, Triangle ...