[Safety and health] PP material; PVC material sleeve; multi-color (4 PACK-2 BLUE + PINK + GREEN) matching packaging; small size; easy to install, installation only takes a few seconds. 360rotationexpandable; can freely adjust the cleaning direction; 360rotating branch water stream; even spray water; splash-proof; save water; convenient to clean vegetables and bowls. [Upgrade mounting ring] Adjustable design; strong stability; firmly fixed, not falling off; suitable for oblong faucet (diameter: 0.6~0.8in) [Medical stone design] Super adsorption effect; super fast water flow; strong filtration (such as heavy metal ions, organic matter, etc.); purification of drinking water and elimination of odors can make your family kitchen life safer and healthier. [Use period] Under normal circumstances, the filter should be replaced after 2 months to obtain pure water, for reference only. You can adjust and replace it according to the water quality and water consumption in various places, which also depends on your personal living habits.