Polyurethane mat with a sieve structure used to filter water from biological contamination and air. The filter foam is a very effective filter that separates solids from liquids and gases, mechanically retaining them while maintaining a very high throughput. We distinguish different gradations of the filter mat grains. PPI is the number of channels per Inch, the higher the filter is, the more effective. Often used in aquariums, compressors and compressors. The filter sponge can be regenerated many times by washing, which is its great advantage. We offer PU PPI 10, PU PPI 20, PU PPI 30, PU PPI 45 foams. In various thicknesses of a filter mat sheet from 5 mm - 100 mm. Filter plates with a thickness greater than 30 mm, available on request, delivery time 7- 10 working days. The dimensions of the filter mat are PU PPI 10, PU PPI 45 1000 x 2000 mm and PU PPI 20 and PU PPI 30 1250 x 2000 mm