This is a King 3B F Attachment Trombone with a yellow lacquered finish. It comes with a case included and features a rotary valve type and a medium bore size. The instrument is made with brass body, bell, and valve material, and has an 8 inch bell diameter. The trombone is designed for advanced-level players and has a Bb/F key. It also includes an F attachment and is manufactured in the United States. This trombone is perfect for any musician looking for a high-quality instrument with exceptional sound. A mouthpiece can be added for an additional price.