This is the foot reflexology massager that uses massage balls made in Tuupovaara in eastern Finland from 2.8 billion year-old Karelian soapstone. Renowned for its thermal properties which allows it to equally maintain cold or hot temperatures, the removable soapstone massagers can be cooled in a freezer or heated in warm water. The balls roll along a natural cork base and enable you to employ your own body weight to massage away inflammation and target the most tender points of your soles. 10" L x 4 1/4" W x 3/4" H. (15 oz.)