Unica is the innovative hydraulic pivot patch fitting door closer that enriches the Biloba series. Conceived for installation on exterior doors, this hinge features pure, essential design and is ideal for installation in any type of setting. It is extremely quick and easy to install in floor and pivot doors as well. Biloba unica does not require the installation of floor or overhead devices or the insertion of a large box into the floor, yet it maintains the advantages of a heel spring closing system.