FILTERED PARTICLES: Wound filter cartridges will be ideal for retaining all suspended particles with a diameter greater than 25 microns. Used in prefiltration on a domestic or industrial water network, these cartridges will effectively capture all the following particles:- Sand- Mud- Dust- Clay- Scaltar- Rust- Algae- Pollens- Organic particles- - - - - APPLICATIONS: With a standard size of 9'' 3 or 4 for a diameter of 2.5'', the filter cartridges will fit most of your filtration or pumping installations. You will be able to equip Eco Home cartridges in the vast majority of: - Filtration devices- Water softeners- Reverse osmosis units- Aquarium filters- - - - - INSTALLATION STEPS:1) Turn off your water supply.2) Open your filter holder housing with a release wrench. 3) Remove the used filter cartridge and check the condition of the inside of the bowls containing the filters. 4 ... Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.