Filter Cartridge 4.5" x 20" Refillable (Empty)

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Refillable filter cartridge 4.5" x 20". Fits in 20" big blue type filter housings. Fill with a variety of loose media such as phosphate crystals, carbon, calcite or resin. 5 micron inner filter cartridge included.
Weight: 1.00 lbs
.Manufacturer: CWS
Manufacturer #: F1012350