NELSEN BIG BLUE 4-1/2" x 20", 20 Micron Melt-Blown

Melt-Blown Spun Polypropylene sediment filters are constructed with 4 -layers of different micron ratings. The graded densities of layers capture particles throughout the entire cross section of cartridge reducing surface binding or buildup. *Thermally bonded fibers will not migrate into water. *Made of high purity polypropylene with good chemical resistance. * Not prone to bacteria attacks.