The Universal Barn door Kit comes with a grid and 4 color gels with metal frames. Barndoor devices alter the shape, amount, or color of the light output from the flash heads * The barndoor direct your light beam from narrow to wide, gives you greater control over your spill light, can also be used for flaggin * Barn door can be used for hard dramatic lighting. All metal construction that will last for year * Controls your spill light, this is a must have accessory for creating professional image * Gels and honeycomb attach to the barn door