1.Swimming & pool & spa filter cartridge epuipment, water filtration system. High-flux Folded Filter Element, which is made of polythylene terephthalate (PET) nonwovens, has the speciality of durability. High Water Flow means less shells, low turnover rate and larger sewage capacity. 2. It is much faster, easier and safer for renewal with the handmade design. 3.The filter element can be used in both aqueous and non-aqueous medium by using the material of PET. 4.The large folded area can reduce much pressure than other filter elements do and gain the longer working life. 5.Large filtering area. 6.High precision.