Package includes only 4 packs, possibility of envy: 8.5X5mm Packaging Material: 4 packs of PVA flannel + zeolite + medical stone + calcium sulfite + activated carbon faucet filter, 5-layer water filtration, safe to use. (2 blue, 1 green, 1 powder) Easy to Install: Our cleaning filter comes with an installation ring, easy to install and use. The mounting hole is flexible and elastic, securely fixed and won't fall off. Suitable for installation on round outlets with a diameter of 16-23mm; water will not fall or leak. Features: This kitchen faucet head can prevent water separation. The water outlets are densely distributed, distributing the force of the water flow, improving cleaning efficiency, preventing water splashing, and reducing water consumption and energy costs. Wide Range of Applications: Small and convenient, it can be installed on most round faucets, such as round sink faucets, single-hole sink faucets, shower faucets, bathtub faucets, kitchen faucets, etc. Note: When the faucet starts to work, black water will flow out. The black water flowing out is caused by the activated carbon base. It can be used normally after running water for 5-10 seconds.