A softbox helps give a great soft light output, perfect for portrait and product photography. The included mask kit have some important tools for better lighting. The grid gives some directionality to the light and helps prevent -Inchspill-Inch while the circular mask gives perfect natural round catchlights, the strip mask gives better lighting control. This kit includes a Stellar Softbox 24-Inch x 31-Inch Grid & Masks set with -Inchs-Inch type mounting ring.