Product material is brass. - To ensure longer lasting use without losing its properties, it is recommended to keep the products away from liquid chemicals such as perfume, water, detergent, and disinfectant. Careful use will not cause tarnishing. - As long as they are not exposed to factors such as water and perfume, our products will not tarnish or deteriorate. Additionally, your skin must be suitable for wearing jewelry and plated products. (It should be noted that some skin types darken.) - Wishing you healthy and happy days.