Which metals are the needles made of, and why are there several? — Lyapko Duet 5.8 Ag 59mm x 467mm

According to the manufacturer's description, the needles are made of metals: iron, copper, nickel, zinc and silver; “Ag” in the model name indicates silver. The base of the applicator is elastic medical rubber. Why several metals are used and how this affects the result is not explained on the product card, so it cannot be judged from the description.

What matters in practice is something else: if you have an allergy or hypersensitivity to nickel or the other metals listed, take this into account before buying — according to the label, the product is not to be used in case of hypersensitivity to its components. If you have chronic skin conditions or doubts about tolerating metals, consult a doctor in advance.