The Insect Buster Bulb Duster comes in a ready-to-assemble kit. The kit includes: Bulb Applicator tubes: one flexible and one brass Funnel Steel ball For optimal application, insert the steel ball into the bulb, along with the powder. This acts to break up any clumps that form. The two applicator tubes are designed to help reach the varying crevices that are all around your home, ensuring you can get even the most difficult-to-reach spots. When you're ready to use the Insect Buster Bulb Duster, use the funnel to add the insect powder of your choice. We recommend our Dust to Dust for an all-natural approach. Do not fill more than three-quarters full. The best way to use the Duster is like using a can of spray paint: shake, aim and spray. When you shake the bulb, the steel ball inside helps to break up any clumps, so that the subsequent spray, or squeeze of the bulb, releases a puff of powder in the direction you're aiming in.