Experience the smooth and rich sounds of the King 4B Sonorous Trombone with F Attachment. This top-quality instrument boasts a large bore size and bell diameter of 8.5 inches, crafted from high-quality brass material. Its unique features include a Rotary valve type, Bb key, and F attachment, perfect for advanced players. The King 4B Sonorous Trombone comes with a sturdy case, making it easy to transport and store. This instrument is made in the United States, and finished with a lacquered brass finish. Whether you're playing in a band or orchestra, this trombone is sure to impress with its exceptional tone and playability. The instrument dates to the 1970’s, has very little to no lacquer wear, the valve and slides all move freely and the main slide is clean. This instrument is ready to play right now!