Reduces skin irritation: Zinc, the active ingredient in the hot springs silver ion cartridge, helps reduce the need for irritants and soothe skin. Quality material: Mineral spa filter sticks are made of zeolite, anion, zinc, dechlorination ball, and VC ball, providing durable and efficient filtration. Suitable for use with cold and hot water tubs. Efficient filtration: The mineral filter stick improves water quality through multilayer filtration, effectively reducing impurities and chlorine. Noticeable results in water clarity and feel. Easy to install and low maintenance: The hot springs silver ion cartridge is simple to install and requires no additional power. Just place it into your existing filter system and let it work. Minimal maintenance required, helping save time and effort. Note: Measurements are manually taken. Please allow 13 cm variation due to lighting and display differences. Color may vary slightly from the image shown. Actual product may differ slightly in appearance.