This MC Pro Bubble Diffuser from Aputure is designed for the MC Pro mini LED light (available separately). It attaches directly to the front of the panel and helps you create a wider and softer spread of light with your panel. The included mounting bracket is made of aluminum with a black hard-anodized coating for durability. The bracket secures to your light via a 1/4in-20 mounting screw and provides one 3/8in-16 and two 1/4in-20 mounting sockets, creating a variety of mounting options.