Kota Rounded Sauna Stones, 5-10 cmNarvi Kota rounded sauna stones (15 kg). Rounded olivine diabase sauna stones. Water will flow from the rounded stones also to the lower (regular shaped) stones, which makes the steam softer. These round stones are suitable as upper stones for all sauna heaters and also as common stones for electric sauna heaters. The diameters of the stones are under 10 cm. Stone weight per crate: 15 kg. $70 price only applies to the purchase of rocks with low output