Rounded Olivine Diabase: Natural grey olivine diabase with a smooth, rounded profile.
Designed for Softer Steam: Rounded stones allow water to flow toward lower stone layers for broader water distribution and gentle steam generation.
4–6 Inch Stone Size: Individual stones range from approximately 4–6 in (10–15 cm).
44.1 lb Box: Each box contains approximately 44.1 lb (20 kg) of natural sauna stones.
Top-Layer Application: Recommended primarily for the upper layers of the sauna heater's stone chamber.
Pairs with Angular Stones: Harvia recommends appropriately sized angular stones in the lower layers, especially in heaters with smaller stone capacities.
Loose Stone Placement: Rounded stones should be arranged loosely to maintain adequate airflow through the heater.
Electric Heater Compatible: Suitable for compatible electric sauna heaters requiring this stone size.
Wood-Burning Stove Compatible: Suitable for compatible wood-burning sauna stoves where 4–6 in stones are specified.
Hand Selected: Stones are selected for clean and safe sauna use.
Natural Variation: Individual stones naturally vary in size, shape, texture, and appearance.