This is a great-sounding and versatile fibre mute for trombone.The Trombone Fibre Mute Model DW5572 is a sensational mute that features a seamless construction and a wooden base. It is great for orchestral and band use, but is also perfect for jazz, with a soft, mellow sound that is perfect for jazz ensemble work. It fits equally well in large bore and medium bore trombones, with generously-sized corks that compress down to fit smaller bells. To ensure a good fit, simply leave your Denis Wick mute in the bell overnight, and the cork will adapt to the curvature of your bell. It has the excellent intonation that is the hallmark of Denis Wick mutes, but provides a professional mute at a student price.