Quality: In particular the parts in contact with water, we respect the highest quality requirements in the choice of materials. Innovation: In order to achieve sustainable product development, we are constantly innovating in the details. Black Basin Faucet Instructions for use: 1.Before installing the mixer tap sink, please flush the water supply pipe to prevent the sediment in the water pipe from flowing into the faucet. 2.Please wear the provided gloves when installing bathroom faucet to avoid fingerprints. 3.The height of the bathroom faucet is 180mm and must be installed on the sink. 4.The left side of the sink faucet is connected to hot water, and the right side is connected to cold water. Q:What is the installation diameter of the faucet? A:32MM Q:How to keep the brightness of the faucet? A:First keep the faucet as dry as possible.If there is has stains, please use neutral detergent to spray on the cloth to be cleaned. If you do not have detergent, you can use toothpaste for cleaning. Q:Material < p>A:The ceramic valve Note: The data is all measured manually, please allow 1-45cm error, due to the difference in light and display, there will be a certain difference in color, the actual object received shall prevail.Note: The data is all measured manually, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, l actual item received shall prevail.