The standard filtering media includes bleached cotton, unbleached cotton, rayon, and polypropylene. Our lightweight, low cost filtering materials offer a high contaminant holding capacity and ability to remove both solid and viscous particles. The Micro-Klean CS series cartridge core is available in a variety of materials including tin plated steel, 304 and 316 stainless steel, and polypropylene and addresses a variety of needs. At 3M Purification, Inc., we manufacture the Micro-Klean CS series filters on state-of-the-art precision winding machines. Yarn-wound filter cartridges are simple and versatile. The component materials (core and roving) offer broad chemical compatibility and economical filtration along with high structural stability. Continuous length winding, regardless of cartridge length, eliminates the "dead" spots found on conventionally wound cartridges. A single roving strand of material produces a consistent and high quality cartridge. This also results in more dense winding in the inner layers and coarser winding in outer layers to produce a more efficient filtering performance than previous manufacturing technology offered. Our advanced manufacturing technology, combined with a choice of media types and wind patterns, ensures filtration solution that best fits the need and provides efficient, cost effective results time and time again.