Pleated filters are widely used as effective surface filtration due to their excellent flow rates and high efficiency. Pleating dramatically increases available surface area whilst maintaining high dirt loading and low pressure drops. Much of the media used in pleated cartridges has some depth characteristics, thanks to multi-layer construction, thereby aiding particle retention and classification. The SPECTRUM Premier range of pleated filters each have specific characteristics targeting applications such as:- Cryptosporidium protection, bacterial control, precise particle removal and sterile filtration.