Complete British National Poly Hive. 1 x Floor with ridged landing board, mesh floor and inspection tray. 2 x Supers inc plastic runners (please choose quantity above). 1 x Brood box inc plastic runners. 1 x Plastic Queen excluder. 1 x Poly-carbonate Crown Board. Compatible with most National wooden hives measuring 460mm x 460mm. Made from high-density polystyrene, it is up to three times stronger than what is used in packaging and has excellent insulation properties, keeping your bees warmer during winter.