Perforated Metal ISO:9001:2008 ss, iron plate, copper , aluminum hole shape:round,rectangular,hexagonal,diamond Perforated Metaluses : On the filtration of auto ... grains ,indoor aound insulation ,ventilation of grain depot ,etc.Perforated Metal Application: widely used in the core of filter, medicine, filtering, breed, battery ... can be done according to the requests of the customers. Perforated Metal