This 10-micron Calcite filter is a generic 10".
Simply put, it will fit any standard 10" filter housing. Several espresso machine manufacturers recommend this filter for those of you who are using an R.O. system to remove hardness from your water. This filter will add back in trace amounts of minerals to your water to prevent leaching of your copper boiler over time. Don't make the mistake of buying a filter system that locks you into a specific brand of filter. Most name brand filters lock you into their replacement cartridges.