The Langstroth Observation Hive Kit has an added extra of an observation window on the sides of the boxes – perfect for schools, open gardens or farm shops alike! 1 Langstroth Solid Floor. 1 Langstroth Brood Box. 1 Langstroth Super Box. Necessary nails for easy assembly. Dimensions: 22 x 18.1 x 20.2in / 562 x 462 x 515mm.