Venetian blinds have been in use since years and are made up of fine aluminium slats both 25mm and 50mm sizes. These are very versatile form of window treatment and gives greater control in terms of privacy and sun control. Venetian blinds are used in both residential and commercial places.
These are controlled by cord to move it up and down and a wand or cord to tilt. These can be installed inside or outside the window frame.