Appleton EY 25% fill vertical and horizontal conduit sealing fittings prevent the passage of gases, vapors or flames from one portion of a conduit system to another. They also restrict large amounts of ignitable gases or vapors from accumulating to confine explosive pressure. Appleton sealing fittings are explosionproof, dust‑ignitionproof and raintight. They are suitable for use in Class I and II locations.