The Laird Technologies RJ45 Field Installable Feedthru Adapter. Passes RJ45 Plug and seals cable to IP68.The Laird Technologies RJ45 Field Installable Feedthru system is used to waterproof cable entries into outdoor enclosures to IP68 waterproofing standards. The unique design is "Field Installable" because it accepts a fully pre-assembled ethernet cable connector. There is no need to terminate the cable during installation. This gives the installer flexibility to use standard pre-assembled ethernet cables.