Collapsible aluminum frames of California Sunbounce System come in different sizes and can be assembled easily with the California-Sunbounce grip head. These extension frames can be combined with reflecting, light-reducing, and light-absorbing screens (optional) in order to produce soft, hard, natural, and artificial lightsThis 20" extension enables mounting a Sunbounce frame (sold separately) to a standard light standThis flexible California-Sunbounce grip head accessory can be extended up to 20 inches