Color: Blue + white + yellow - Material: Plastic - The diffuser is used to create exposures of even density over the entire surface of film. - Use the diffuser by placing it flush against the front of the lens and exposing through it. - The light that passes through the diffuser and on to the film will create an even density across the surface of the film. - Flash straight on if without our diffuser causes the light to go forward only and creates a harsh shadow behind the subject. - The flash with our diffuser installed and tilted at 45 degrees gives a nice soft wrap around of light with a soft shadow behind the subject. This fits cleanly over the head of your existing flash no need for cumbersome attachments hooks. - It disperses the light over a wider area for a softer more balanced and natural effect than you didn't use before. - It helps to reduce hard background shadows and eliminates the annoying red eye effect.