This is a set of 2 snoots for the Photogenic Mini Spot Fresnel light. One has a 1" opening, the other has a 2" opening.
Use of a snoot will result in a small circle of light, when it is attached to the front of your light source. The size of the circle of light will be determined by the opening of the snoot, its length, and the distance of the subject. Consider them as a painter would a brush, or a sculptor would a knife, or chisel.