... Plate, Stainless Steel Plate, Aluminium Plate, Alloy Plate, etc. filter media Pre-cast Concrete Perforated Slab ,punching hole net Materials: Low ... , fish scale hole, etc.Production can be made in different material, style or hole diameter.Uses: used in filter of automobiles ... , sound insulation of room, ventilate of grain depot, etc. Filter media ,filter material