Replacement Pall high-flow cartridges are made of deep fine polypropylene or glass fiber membrane as filter media, with a large diameter of 6 inches / 152mm, no center rod, unidirectional opening, and specially designed to flow the liquid from the inside to the outside, ensuring that all contaminant particles are trapped inside the cartridge. The ultra-high flow rate design allows for a significant reduction in the use of cartridges and filters for the same flow rate application, resulting in significant savings in equipment investment costs and labor costs.