The MUNI.Zs 05-39-ESS is a Suez Muni.Z cartridge filter with a nominal retention rating of 5 micron. Muni.Z filters are engineered specifically for municipal water pre-filtration. The MUNI.Zs 05-39-ESS has a nominal length of 39 in. with a 2 1/2 in. OD and a 1 in. ID. One adapter is a 222 O-Ring while the other adapter is a Solid End. The Muni.Z is 100% Polypropylene Construction: for high purity demanding applications. Graded density: traps large particles on the outside, small in the body of the filter.