Reduces skin irritation: Zinc, the active ingredient in the hot springs silver ion cartridge, helps reduce the need for irritants and reduce skin irritation Quality Material: Mineral spa filter sticks are made of zeolite, anion, zinc, dechlorination ball, VC ball, durable high efficiency filtration material and can be used with cold and soft hot water tubs /p> Efficient filtration: The mineral filter stick makes water healthier with multi-layer filtration, which can effectively filter various impurities, chlorine. The change you can see, feel and feel improves water quality Easy to install and low maintenance: Hot Springs silver ion cartridge is easy to install and heatless, can be installed with your existing flow, simply drop it into your existing filter and let the spa wand do its job. Low maintenance, saving you time and money Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, there may be some color differences, please