For over 20 years I have longed for a cabinet incubator, and I finally have one! I have used numerous small metal or styrofoam incubators over the years, but now I have hit the big time. The capacity is about six times the size of the styrofoam incubator I had been using, which I can re-purpose as a hatcher. I can hatch out more fertile eggs rather than give them away to others to hatch. Guinea eggs are in the top tray, chicken in the center and Muscovy ducks in the bottom.