Profile: Facet Industrial UK Ltd. specializes in providing filtration products. The MP series is pleated paper removal of solid contaminants such as rust, dirt, scale, granular and other solids, 0.5 micron to 75 microns nominal. Facet FI3739 Series filter cartridges are manufactured with pleated media, metal end caps with an internal O-ring seal, metal center tube, and a nylon outer sleeve for pleat stability. This construction allows the cartridge to withstand a differential pressure of 100 psi, and large effective surface area from 45-60 square feet, depending on the media and micron size used.