The mute case from Neotech provides a safe and convenient way to transport and store your brass instrument's mutes. The soft, durable Neoprene pouch stretches to accommodate a variety of sizes and types of mutes, protecting them against dust, moisture and impact. The drawstring closure secures and releases quickly and easily. A convenient snap hook is provided as well as a pair of touch fasteners that allow you to "piggyback" The mute case onto your instrument's carrying handle. mute case is available in three sizes: French horn: 4. 75" Diameter x 9" Long (12, 1cm x 22, 9cm)trombone: 6" Diameter x 12" Long (15, 2cm x 30, 5cm)trumpet: 3. 75" Diameter x 7. 5" Long (9, 2cm x 19, 1cm).