Density technology multi-layer : the filter with water for the whole house is designed with three layers of polypropylene of high density. to remove most particles and sediments. The inner layer is 1-5 microns; the middle layer is nominal 10-25 microns; while the outer layer is nominal 25-50 microns. Density technology Multi-layer can capture impurities in a targeted manner and have a 30% longer lifespan than the other common type. New generation and new technology: adopts acupuncture technology and triple compression technology; pinhole camera, manufactured Made of 100% pure polypropylene and the density filter matrix truly captures particles across the entire depth of the filter. Longer lifespan than other similar products. High capacity : the filter can filter up to 100%. 20,000 to 30,000 gallons depending on quality some water. We suggest replacing it every 3 weeks. 6 months for the average household for optimal performance depending on use. Let it bring a wonderful experience of