The Sterasyl Ceramic Filter is a self-sterilizing filter that can be re-used over again to provide absolute micron filtration down to 0.9 microns
The Doulton W9220406 cartridge is open on both ends (OBE) and fits in standard 10 and 34, filter housings
The Doulton W9220406 Imperial Hollow Core OBE Filter features a Sterasyl ceramic outer shell with no core
Model number: W9220406