By forming a mechanical seal between pipes going through walls, floors and pipeline casings, APS Innerlynx® are designed to be installed quickly and easily by one worker with no special training. Innerlynx® are non-conductive and isolating. Innerlynx® are made from synthetic rubber with heavy-duty, plastic pressure plates. Sixteen different sizes of Innerlynx® are available for most pipe sizes with diameters ranging from ½” to 120”.