Single round plastic high flow filter housing is made of 100% polypropylene. It has excellent chemical corrosion resistance. It can place a high flow filter cartridge with an outer diameter of 6.5" (152.4mm), and the cartridge length supports 20", 30", 40". Also support multiple brands of filter cartridges, like PALL Ultipleat/Marksman, Parker Fulflo MegaFlow and Pentair Aqualine.