The SXG-9 3/4-ESS, a GE Suez Selex cartridge filter with a nominal retention rating of 3 microns is 9 3/4 in. in length with one end being a 222 O-Ring while the other is a Solid End using Silicone seals. Selex filters are made from 100% polypropylene and are a precision, graded density cartridge th..