They sold this item at the Salmon University booth at the Sports show in Puyalluo. It is a Hard Plastice tube about the size of a tube of toothpaste. It has many small holes all long it sides. The scent is pellets that you pour into the tube. The tube is attached to your downrigger line or ball and it spins behind the line and allow this sent to flow back where your lure is. The pellets are supppose to last from 2-4 hours. The pellets are made out of fish food that they feed salmon fry and some anchovy and herring in it. They were seiing a medium size bag of food and the tube for $20.00. John Keizer says it real works