6 Frames Langstroh Nuc body. They are made of extra hardened expanded polystyrene (PSE). As it has a density higher than 100 kg/m3 it is stable against the attack of microorganisms and rodents. An ultralight material that insulates both cold and heat, thus helping to facilitate the work of bees that will not need to make an extra effort to regulate the temperature inside the hive. This translates into higher honey production at the end of the season. Frames not included.