Fmaj11 chord

The F major eleventh chord (abbreviated Fmaj11 chord) is a six-note chord consisting of the notes F, A, C, E, G, and B♭. The chord is formed by adding an eleventh to the F major ninth chord.

In practice, the fifth (C) is often omitted from the Fmaj11 chord to avoid a very dissonant sound, and because it's not always possible to play all notes simultaneously.