Glasfloss Automatic Roll Filters are designed to fit in automatic, semi-automatic and manual type roll filter machines without modification to existing hardware. Glasfloss Roll Filters shall incorporate progressively dense fiberglass media or 100% non-woven polyester media. For added strength, the progressively dense fiberglass and 100% non-woven polyester grades of media shall incorporate a scrim backing on the air-exit side. Glasfloss Automatic Roll Filters shall incorporate a heavy-duty paper leader and trailer that is sewn to the media. The automatic roll filter’s media standard length shall be sixty-five feet.