You can order the latex and bands that hold it in place for the tube on Ebay if that is what you need. The latex comes in varying thicknesses, all of which will produce different pitches and tones. The amount of tension you put in the latex when you stretch it on your tube will also make a difference. With a little practice, you should be able to learn how to put the latex and band on the tube pretty easily and learn how to use the call.