About This TAP WATER PURIFIER: Built-in layered filter separates coconut shell activated carbon, zeolite, PVA non-woven fabric, calcium sulfite and rubber, suitable for purifying hard water and well water, removing fluoride, heavy metals and other impurities. EASY TO CLEAN: A must have for home and office, 100% brand new and high quality material. BPA free, not easy to deform. To clean, simply remove the filter and rinse underwater, but please replace the PVA non-woven fabric regularly, usually once a month. We will give you a box of PVA nonwoven fabric. APPLICATION FUNCTION: The kitchen faucet water filter can be rotated 360°, easy to install and can be rotated in multiple angles. The faucet water filter can effectively increase water pressure, powerful rinsing and prevent splashing. Make sure the faucet size: Make sure to measure the spout of the faucet. It should be between 16 and 30 millimeters (0.62-1.18 inches). Please unscrew the top cover vertically and replace the PVA-nonwoven fabric; prevent the pellets from falling out of the top cover.⚠️ QUALITY - PREMIUM, PRICE - REASONABLE: Made of brand new material PET + ABS, it can meet the requirement of long term use, and it is proven to be still usable after many years, just replace the PVA non-woven cotton core. Overview Material : Plastic Product Dimensions : 1.8'D x 1.8'W x 4.7'H Item Weight : 3.36 ounces External Testing Certification : CE Product Benefits : Removes Fluoride