*Sturdy and Convenient Design: Food grade ABS plastic for most taps. 21.5mm faucet with external thread, 23.5mm faucet with internal thread and 14-22mm female thread tap with 3 different interfaces. Please note that the size is as important as the type. It is not possible to judge whether the faucet is suitable. Please send a picture and size to the seller for reference. *Maintenance and Replacement: The recommended filter life for each filter is 3-6 months, please replace it in time. In addition, remove the filter element every two weeks and wipe it with sandpaper. Do not use detergent. *The Package Includes: Plastic case (with a filter element) + water purifier switch + metal transfer interface + plastic hex connector + universal adapter + waterproof gasket. If you encounter any problems during use, please contact us by email. *8-layer Ceramic Membrane System: This filter can remove impurities, heavy metals, chlorine, etc., reduce scale, soften water quality, improve taste and promote healthy lifestyle. *Double Outlet Design: By simply pushing between the faucet and the purified water, the filter cartridge life is extended (due to local water quality and frequency of use), saving time and water.