Siemens Water Technologies offers a variety of filter cartridge replacements and housings to meet specific configurations and filtration needs. The NT series is designed to deliver precision prefiltration through a patented advanced melt blown structure that incorporates large diameter fibers for strength while maintaining small fibers for filtration. The filter is 100% polypropylene construction and is free of surfactants, binders and adhesives. All materials of construction meet Title 21 of the U.S. Code of Federal Regulations. Product (3 micron and higher) in compliance with EU Directive 2002/72/EC for plastic in food contact (in simulants A, B, C, and D). The polypropylene components meet the specifications for biological safety as per the USP for Class VI-121°C plastics (gaskets/O-rings excluded).