NATIONAL BEEHIVE FLAT PACKED SET. This National Beehive set includes. Assembled varroa mesh floor with inspection drawer 46046050 mm and with landing board. 1 pc of 14″12″ Deep Brood box 460460317 mm. Wall thickness 20 mm. 2 pcs of Super Boxes 460460150 mm. 1 pc of crown board with two oval holes 460460 mm. Assembled wooden roof with galvanized metal cover 520520120 mm. Internal walls of super and brood boxes have angled tops (like runners) to avoid sticking. To walls of boxes. This is the perfect Beehive for anyone from a beginner just getting started, to an expert beekeeper with lots of hives, thanks to the strong and simple design and the standardised size of the hive.