Wick Mouthpiece Boosters are attachments that fit over existing mouthpieces to convert them to a HeavyTop style. Designed to be used with Denis Wick or most any brand of mouthpiece, the Booster slips over the shank and cup of the mouthpiece. The extra weight of the Booster transfers more energy to the instrument, allowing for a more powerful sound, more secure high register playing and a more focused tone.