1.Saxophone (alto, tenor or baritone)
2.Trumpet
3.Double bass
4.Guitar
5.Piano
6.Drums
However some variations also involve:
7.Bassoon
8.Cello
9.Clarinet
10.French horn
11.Trombone
12.Tuba
13.Vibraphone
Cool jazz has also been know to employ orchestral instruments from time to time as well like violins or cellos for a wider texture to the performance.