Many applications benefit from using the high efficiency, large surface area, low pressure drop and inert properties of the WRAS approved Premier Pleat Polypropylene cartridge. Four pleated media layers combine to construct a pleat pack with depth characteristics and the main filtration media layer delivers high efficiency and exacting micron classification. An improved cage construction for 2018 delivers excellent flow dynamics and is designed to protect the integral pleat pack whilst providing overall rigidity and strength to the cartridge.