The Hal Leonard Jazz Combo Paks are a versatile and inexpensive way to put four fantastic charts in front of your high school or college combo. The flexible instrumentation provides many options for covering theparts; the arrangements are absolutely top notch; and at $45.00 for four standards you will never find a better value.Instrumentation:- Line 1 (lead or harmony): Alto Sax Trumpet Soprano Sax Clarinet Flute Vibes- Line 2 (lead or harmony): Alto Sax Bari Sax Trumpet Soprano Sax Clarinet Trombone- Line 3: Bari Sax Tenor Sax Trumpet TrombonePak #19 includes: Blue in Green • Milestones• Seven Steps to Heaven • So What. (Note: CD includes tracks for two paks.)