-Using the Eumer ball tube you will quickly and easily tie a fish-catching fly -You will find it possible to make really small and effective tube flies with the Eumer ball tube -The ball at the front end of the tube functions like a shot ball normally does, as a strike point and a weight -You can use this tube to easily make, for example, an efficient leech for rainbow trout and brown trout -The tube comes in two different sizes and in 10 different colors