According to the composition on the product card (INCI), the spheres are made of two natural materials — shungite and flint; the set consists of two spheres 4 cm in diameter (net: 2 pcs × 4 cm), used as a pair. The manufacturer does not explain how these materials differ or why they are combined in one set.
This is an accessory for relaxation practices: it has no proven therapeutic properties and does not replace medical care (general information, not a manufacturer's instruction).