Denis Wick Booster for TrumpetHeavytop Conversion Booster Trumpet Mouthpieces Silver Plated (DW6181 Hvytop Conv. Booster For Trmp MPs) Wick mouthpiece boosters are attachments designed to be fitted to existing Wick mouthpieces, converting them to HeavyTop models. The booster's extra weight helps to transfer more energy through the horn and to the bell, resulting in a more powerful sound, more secure high register playing and more focused tone. Fits Wick trumpet mouthpieces.