The Rapid Box 20” Octa Mini, 26” Octa, and 32” Duo are designed specifically for speedlite. Each of these modifiers includes a built-in speedlite bracket(s). The Rapid Box 24” Beauty Dish, 36” Octa XL, and 48” Octa XXL are designed for use with studio strobes and constant monolights. Each of these modifiers comes equipped with a built-in speedring available in 5 different mounting styles. When purchasing, be sure that you select the speedring that is compatible with your light source.