[APPLICATION] Replacement chamber for Ionizer Hybrid Pool Treatment System and Perma Salt System. Compatible with above-ground pools, in-ground pools, and hot tubs or spas. Designed for swimming pools up to 40,000 gallons. [A MUST HAVE] Helps maintain clean, healthy, and eco-friendly pool water when used with the Ionizer Hybrid Pool Treatment System. Replace the chamber when the indicator light turns red. [RECOMMEND] Annual replacement is recommended for optimal performance. The chamber typically lasts 1 to 2 swimming seasons depending on climate and usage. [KEEP SAFETY] Releases natural minerals into pool water to help maintain a safe environment for swimmers and reduce exposure to irritants. Helps prevent itchy skin, eye irritation, and swimmers ear. [PERFORMANCE] This chamber is not a filter. It is the tube housing that holds copper and silver electrode bars, which release ions into the pool water for treatment. Color: Black Material: ABS + copper Tips: Product design may vary slightly between batches. Minor differences in color or appearance may occur and do not affect functionality. Package Contents: 1 x 4CH4002R replacement chamber Note: Light reflection and display settings may cause slight color variations between the image and the actual item. Measurement error allowance: +/- 1-3 cm.