Use inside No.HD-950 filter housing to extend life of major appliances or provide clean, fresh drinking water by reducing coarse sand, scale and rust particles (50 nominal micron rating). Also fits Omni, Selecto, and Flotec. Durable, non-woven pleated polyester. High flow rate/low pressure drop capabilities for well-water applications. 6-month/24,000-gallon life depending on usage and water conditions. NSF International tested and certified.