Jupiter JAS510A Alto Saxophone - EbJupiter is proud to introduce the successor to the popular and well known JAS500 alto saxophone. The JAS510 offers the same ergonomic features of the action that were introduced with the 1100 Series Colors of Sound alto saxophones. The position of individual keys has been adjusted, angles changed and the heights and lengths of the levers optimized to create a comfortable playing experience and prevent stress and fatigue right from the start.