The Norman Round Grid is a light modifier that changes the shape and intensity of light that comes from a flash head.It is a key accessory in lighting system that spreads the beam to 30 degrees when attached to the Norman 5" reflectorThis grid produces a small circle of light whose size is determined by the density of honeycomb, its thickness, and the subject distanceThe Norman Round Grid has dimensions of 5 X 5 X ½"It requires the GH5 grid holder for attachment