I purchased this for installation, but it didn't fit my faucet. Although it's unused, the package has been opened. This is a KAKUDAI water faucet adapter with a maximum flow rate of 450L, and it's easy to install. I'm selling it because I don't have much use for it. As you can see in the fourth photo, there are some mineral deposits. This does not affect its use. - Brand: KAKUDAI - Model: 211-001 - Maximum Flow Rate: 450L - Installation: Easy Installation