HUKKA Karelian Soap Stone SAUNA Accessory Stone. Place it on the sauna stove or in the interior. If you put it on the sauna stove and let it roll, it will start laughing. Pure and unique Karelian soapstone that withstands high temperatures. Karelian soapstone, created in Finland 2.8 billion years ago, natural stone material creates the atmosphere of an authentic Finnish sauna. <size> Width 90mm x Depth 90mm x Height 24mm * Because it is a natural stone, the size may vary one by one. <weight>340g