The best self cleaning feeder in the industry, the Fine X Screen Feeder. Fine X feeder uses hardware cloth that is attached to the feeder frame with rivets and flanges, forming the trough and even part of the back. This way the pellets have to roll down over the hardware cloth, sifting out most of the fines and dust before collecting in the trough. Feeder mouth opening measures approximately 1.75" wide. We do offer optional covers, please choose between the AFC or FC style.