Keep your extruder, extruder screw, and dies clean with copper gauze. Copper gauze will not scratch or rust and can be used while the machinery is still hot. Our copper gauze is two grades in one: Use outside surface for normal cleaning, or turn inside-out for heaving cleaning. Can be fed directly into extruder hopper of single screw extruders to clean screw and barrel between jobs. Available in rolls of 100 feet or 400 feet, as well as hand pads.