"Larger size allows breeders to ""pre-grow"" frames and helps keep the bees from plugging out the frames. Holds 6 mating frames (sold separately) High density construction provides optimal temperature stability Closable entrance on each end 2 built in feeders with queen excluders 2 removable bottom panels offer extra ventilation and easy clean out Reinforced pry point doubles as a handle Stackable Measures 8½"" x 17¾"" x 11"""