1.7mm thick - This sterling silver rounded box chain offers a subtle texture and supple feel that's an ideal choice for custom designs. Offer it as-is, or use it to complete a pendant or necklace design. This chain is plated with fine silver to ensure a bright white color and to help protect against tarnish.Box chain has squared-off links that resemble cubes; they are sturdy chains, ideal for pendants. In rounded box chain, the links are created from half-round wire, giving the finished chain a rounder profile.