My suggestion is to save your money and by straight up stainless steel (polished no fancy color) rod version. To have a plating, a percentage of copper and zinc is used in the metal formulation. Rather than having a metal formula that can weaken over time, stay with the standard medical grade version that don't. If there are only the golden rods vs the plastic rod version, I go with the golden rods. Talking about limiting the amount of product variation to trap a buyer into.