Poly Spun Sediment Filter – 0.5 Micron (Nominal) Size: 10″ x 2.5″ Standard Size Cartridge. Suitable for all town water usage. Constructed from polypropylene which is spun. There is no centre core to restrict filter performance. These filters are compatible with most liquids and are highly effective for sediment, rust, sand, silt, and algae removal. The filters have no chemical residuals. Carry a heavy load of sediment – Longer Life. We use these filters-due to high performance -flow rate-load capacity & their inability to grow bacterial slime.