Sink mixers typically consist of a spout, handles, and internal mechanisms. The spout is the part of the faucet where the water flows out. The handles, usually one or two, are used to adjust the water temperature by controlling the flow of hot and cold water. Many modern sink mixers have a single lever that allows users to easily control both hot and cold water with a smooth, single motion. When choosing a sink mixer, it's essential to consider factors such as the type of mounting (deck-mounted or wall-mounted), the number of handles, the spout height and reach, and the overall design to ensure it meets your specific needs and complements your kitchen decor. Additionally, checking the water flow rate and the availability of any water-saving features can also be beneficial to promote water conservation.