We made a whole bunch more of our 5 frame nuc's with room for an internal feeder. They seem to be working really well. They are 9 inches wide inside just enough for the 5 frames and a feeder made out of 1/2 in plywood. It has a screen bottom board and an opening 1/2 x 1 inch in the front for the bee's. It is great for swarms and nucs. I will post some pictures later. We are up to 20 of them now.