KGUBrass Custom Trumpet Mouthpiece Booster, Raw Brass - Limited Edition A well-focused and concentrated tone : KGUBrass custom trumpet booster opens the way for more personal sound of your trumpet. You have a chance to check the perfect resonance without dampening the vibration and a clear focus on tone Design: It will stress every advantage of your musical instrument. Due to the delicate, gorgeous design combining a smooth shape and shiny surface, youll see your trumpet in a new way as well as your listeners will do Easy to use: Easy on/off design helps to attach the accessory without any trouble. Make you playing more versatile and powerful, depending on the style of the masterpiece you play