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 Brood box 460460227 mm. Wall thickness 20 mm. 2 pcs of Super Boxes 460460150 mm. 1 pc of crown board 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.