Polypropylene Monofilament. Made from virgin polypropylene (Homo-polymer). Extruded in 12 mil filaments, twisted by denier (size) and packaged to your specification. Supplied in flame retardant, which is yellow, or regular, which is white or black. For use in power and control cable where a non-hygroscopic requirement exists. Used in tray power and control specialty cables and interlock armour cables where flame retardant filler is required. Good for any specialty cable that requires a very smooth construction. A good utility filler that will suit many needs and also used as a tying twine.