Natural Olivine Diabase: Made from subvolcanic olivine diabase mined in Western Finland.
Split-Face Design: Angular fractured surfaces provide substantial heat-storage area and efficient water evaporation.
4–6 Inch Stone Size: Individual stones range from approximately 4–6 in (10–15 cm).
44 lb Box: Each box contains approximately 44.1 lb (20 kg) of natural sauna stones.
Designed for Airflow: Angular stones can be arranged loosely to maintain airflow through the heater's stone chamber.
High Thermal Conductivity: Natural stone construction is designed to absorb and transfer heat during sauna operation.
Electric Heater Compatibility: Designed for compatible large electric sauna heaters requiring stones of this size.
Wood-Burning Stove Compatibility: Suitable for compatible Harvia wood-burning sauna stoves.
Select Harvia Series Compatibility: Identified for use with Virta, AF (Forte), M, Pro, and Legend Series heaters and stoves.
Natural Variation: Each stone is naturally unique in size, shape, texture, and appearance.