... Steel Plate, Stainless Steel Plate, Aluminium Plate, Alloy Plate, etc. filter media Pre-cast Concrete Perforated Slab ,punching hole net Materials ... in different material, style or hole diameter.Uses: used in filter of automobiles internal-combustion engine, sieving of mine, Medicine, grain ... , sound insulation of room, ventilate of grain depot, etc. Filter media ,filter material