CableMax™ foamed polypropylene monofilament filler yarns are manufactured with a proprietary process that expands the filler volume by 28-30%, giving outstanding fill per unit weight, lower cost and superb impact & crush resistance without the high capital costs and limited line speeds of extruded fillers. The yarns are clear in color and will evenly fill cable free space, improving the aesthetics, robustness and marketability of your cables.