“We brought this cage to attach to a 4" diameter tube feeder. The loop holder atop the tube feeder would not fit through the slot atop the cage. There was a piece of wire around the inner part of the slot where the tube feeder loop would pass through. We cut the inner wire and the tube feeder loop fits through the top of the cage now. The cage is made well. The squirrels are not able to get to the seed in the tube. Would recommend this product.”