Extra Small is 33 lbs of 1" - 2" (3-5 cm) while Small is 33 lbs of 2" - 4" (5-10 cm) of rounded olivine sauna stones. We highly recommend using rounded stones in HUUM heaters to compliment the design and have milder steam. The stones are durable and have high heat capacity.
Olivine diabase sauna stones
Rounded shape to complement heater design
Durable with high-heat capacity
Stones range from 1" to 2" (3-5 cm)
1 Box contains 33 lb box of 1" to 2" (3-5 cm) round Olivine sauna stones
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