HUUM Stone Cage for HIVE Series Sauna StovesThe stone cage is mounted straight on the stove around the flue and filled with up to 88lbs of sauna stones. Thanks to the added stones, the surface for pouring water significantly increases, and that means less hot metal surfaces, that we wish to keep minimal in the sauna. The stone cage filled with sauna stones is also a decorative element matching with the sauna heater. Stone cages can be installed on top of each other.