Jupiter JEP1025S 4 Valve Euphonium (Silver Plated)The JEP1020S features a traditional 3+1 valve design with 3 top action valves and an angled left hand 4th valve to eliminate the use of the right hand pinky finger. This design is very comfortable to hold and play. The . 570 inch bore offers a warm, rich euphonium sound perfect for band and solo work. Features Silver plated brass body is made from the highest quality brass and finished with a bright silver plate ensuring fine playability and tonal