These are great, and I found them here before I even knew they existed. Very stout platic is used for these. I have 5 RCA wires and 14/2 ga speaker level wire poking through the single gang plate and it fits about perfect. 1 more RCA and I probably would have had to switch to a double. The done give a description of the size of the hole so hopefully this will give you an idea of what will fit.