Jupiter JTB-700 Bb Trombone T-Bone Brass Band Instrument w/ CaseWelcome, you are looking at a great piece. This is the Jupiter JTB700 Trombone. With its durable nickel silver outer slides, the JTB700 is a great beginning instrument featuring a . 500" bore and chromed inner slides. The Lacquered Brass Body is produced using state of the art technology to ensure an instrument of the most accurate scale and playability Nickel silver outer slide with hand lapped chromed inner slides offer superior response and a more