1.Universal water filter replacement fits any standard 10 inch RO and Whole House systems. 2.The whole house water filter is designed with density three PP layers to remove most particle and sediments. The inner layer is Absolute 5 Micrometre; the middle layer is nominal 7 Micrometre; while the outer layer is nominal 10 Micrometre. 3.The multi- layer density tech can capture impurities targetedly and have 30% longer service life than the other common type. 4.The filter can filter 20000-30000 gallons depending on water quality. Suggest to replace it every 3- 6 months for the average household for optimal performanc. size:254*60mm Material:Polypropylene colour:white Package Contents: 3 * Filter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.