8-leaf barndoor (168mm/6.6'')

This is an 8 leaf barndoor set for the Arri 650W Fresnel. 

Barndoors narrow the beam spread of a light fixture. They help create a 3-dimensional look to a lighting scheme by placing light in a specific area, or by keeping it away. 

The more leaves a barndoor set has, or the longer the leaves the more precisely the beam can be controlled.