20" X 2.5" Polypropylene Sediment Replacement Water Filter Cartridges:– SIZE: 20” X 2.5” (505 mm x 52 mm) 5 Micron (5µ) This Filter is Available in 1, 5, 10, and 25 Micron (µ) Use as a Stand alone Filter for Tank Water or ideally as a Pre-Carbon Filter in a Twin Filter Unit. Reduce your Water Filter Costs in a Twin Filter Sediment Carbon Filter Combination Unit by cutting Sediment Load to the Carbon Filter. Pre-Filtering when using Tank Water Supply. Consider using a Floating Suction in your Water Tank to reduce the Sediment Load on your Filter and extend its serviceable life. Sourcing the water from under the surface of your tank provides an overall cleaner supply than the conventional drawing of water from the anerobic zone in the base of the tank. Features: