This 10 frame beehive addition from Honey Keeper is constructed to help you expand a prosperous colony. The foundation is built with premium fir wood while the frames are made of white pine wood. The kit comes with everything you need to add a deep super structure to a Langstroth style bee hive with 10 deep frames and pre-cut frame foundations with unwaxed hexagonal shaped foundations surfaces. Super structure dimensions – 16-1/4″ long by 20″ wide by 9-3/4″ high. The hive super is easy to assemble with pre-cut dove tail joints and also includes heavy duty nails.