The product is a set of sheet music books for trombone solo and piano accompaniment, featuring classical genre music. Published by Belwin in the United States, these beginner-level books are perfect for aspiring musicians looking to enhance their skills in playing the trombone and piano. With easy-to-follow sheet music and a focus on classical music, this product offers a great opportunity for beginners to practice and develop their musical abilities. Ideal for those looking to explore the world of contemporary classical music through the combination of trombone and piano.