$68.99 Sediment Pre-Filter, 5 Micron Pleated Filter Single System (available in 3 sizes) | Hydropure 
PARKER 5 Micron Rating Filter Cartridge, 2 1/2 x 20 in H, 8.0 gpm | eBay
Double layers microns filtration (5 micronx10 micron) spun polypropylene filter cartridge for 
