The Watero Filter Cartridge replacement has a media filtration area of 90 square feet and is designed for the Opal XL 270 Cartridge Filters. The cartridge is 30 microns and the filter requires two cartridges (this one and #701038).
Waterco filter cartridge replacements are made by Pleatco which feature a unique Pleatco Point Bonded Filtration Fabric which ensures superior dirt collection among many other features. These filters allow you to have extended time between cleaning and servicing, less frequent replacements, and less energy consumption.