A Range Of Polyester Reticulated PU Foam. Offers Good Filtering Characteristics, Lower Pressure Drop Thus Providing Constant Pure Air For Your Engines, Equipments Or Clean Rooms. Suitable For Use In Pre-Filters Or Air Filters. Products Available From 10 Ppi To 80 Ppi,In Sheet Size 1 Mt. X 2 Mt. As A Standard, In Various Colours.