The Doulton W9220406 Imperial Sterasyl OBE Ceramic Filter fits standard 10" filter housings and provides sub micron filtration of drinking water. The Doulton W9220406 Imperial Sterasyl OBE Ceramic Filter has a ceramic shell that is impregnated with silver to inhibit bacteria growth, making the filter self sterilizing. The Doulton W9220406 Imperial Sterasyl OBE Ceramic Filter is open on both ends, and offers a micron rating of 0.9, a flow rate of 1.33 gpm, and a 2600 gallon capacity. Use the Doulton W9220406 Imperial Sterasyl OBE Ceramic Filter to remove turbidity, E.Coli, Cholera, Typhoid, Cryptosporidium, and cysts. The Doulton W9220406 is easily cleaned for extended life.