Instructions
Set up the lighting fixture you plan to use to light your subject. The snoot tube is only a lighting accessory and must be used in combination with a light source.
Push the proper sized rubber hood onto the end of your light fixture. The rubber hood allows you to change different snoot tubes depending on how narrow you want your stream of light.
Insert the snoot tube firmly into the rubber hood---it will just sit in place. If you don't have a snoot with a rubber hood, the snoot will simply push over the top of the light fixture itself.