... your demand 5.have factory Material:Low carbon steel board, stainless steel board, copper board and nickel board.Characteristics:The ... .Uses:Mining, medicine, food selection, indoor noise, silencers and grain storage ventilation, mechanical protectionHole patterns:Round, Rectangular hole, square, Triangle, Diamond, ... 52212019.69.41.55812035.397.843351612019.618.8 Perforated metal screen wall(Factory)