Jo-Ral is one of the top professional aluminum mutes in use today, used by professional Brass players worldwide. Taking the experience and knowledge of building some of the best copper and aluminum mutes in the industry, the Jo-Ral designers have focused their attention on designing a quality plastic mute. A straight mute is usually the first mute that a brass player will need, and the Jo-Ral plastic mute is the perfect place to start.