Intermittent problems traced back to water getting into box and corroding foil runs on back side of circuit board of Surge Protector.
No idea as to how water got inside box. Both cable ports were at bottom, with both wires going down. Both cable clamps were snugly screwed down against Ethernet cables. Box lid was securely screwed down. Lid seal does not appear damaged.
Circuit board itself needs sealer put on it, to prevent water from getting on foil runs.
-- Pros: The enclosure is well made, and contains hardware for mounting on a flat surface, or directly to a mast via a hose clamp.
-- Cons: My biggest disappointment was that the holes in the fittings are too small to actually fit an RJ45 connector through. I had to notch out a few corners with a utility knife to get my connectors through them. Also, the fittings don't line up properly with the jacks, so the cable has to bend a bit to plug in.