The SK-HC18 by StudioKing is a honeycomb which fits into a standard 18 cm reflector. Thanks to the reflector you can reduce the light beam: the light is spread at an angle of 40 degrees. If you would work without this reflector, the light would be spread at an angle of up to 180 degrees. The SK-HC18 gives you more control over the light, so you can illuminate the subject in exactly the right place. The flexible bracket on the side ensures that the SK-HC18 clamps firmly into the reflector.