Stainless steel plate, aluminum, hot and cold steel, copper and fiber board, plastic board, ... hole, the drum, hole, etc.Can be used for through the city zone of the highway, railway, metro ... be used for the building, the balcony, environmental protection desks and chairs elegant adornment orifice plate, and can ... as sound of dustproof enclosures, etc. Stainless steel. Galvanized sheet round hole nets