Jupiter JAH700S 700 Series Alto Horn - Key of EbThe JAH700S Alto Horn is a great choice for the player looking for an entry level Eb alto horn. The JAH700S features a . 433" bore with a 7. 2" upright bell for excellent response and nickel silver valves for quick action. Features Silver Plated Brass Body is made from the highest quality brass and finished with a bright silver plate ensuring fine playability and tonal brilliance Stainless Steel Pistons have remarkably smooth, fast action for improved