The Ceraline sink faucet by Ideal Standard requires 1 hole for installation. It can be installed in a hole made in an inset, undermount, or wall-mounted sink. 

Additionally, it is tall, making it suitable for freestanding sinks, such as countertop sinks, as it can also be installed on a counter. 

Depending on the construction, it can be installed behind the sink or on the side. However, you should check that the water flow ends up in the center of the sink to ensure full functionality.

It is a mixer faucet, meaning it has a single mixing mechanism to achieve the desired water temperature.