Thank you for viewing. Features black beads and metal rings. This simple and stylish necklace is easy for adults to wear and goes well with casual clothes. - Brand: COLANCOLAN - Model Name: COLANCOLAN FORCE3 - Color: Black - Size: M (approx. 45cm) - Materials: Joint parts, metal fittings, Wire/Stainless steel, Metal parts/Stainless steel, Natural radiation natural ore containing ceramics - Accessories: Necklace, Instruction manual, Box, Case Purchased from the official COLANCOLAN online store and used about 3-4 times. This is a used item, so please consider purchasing with the understanding that it is pre-owned.