The E suspended fourth flat ninth chord is a 5-note chord consisting of the notes E, A, B, D and F.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as Eb9sus.
Chords that are a superset of Eb9sus. The chords include more notes but always E, A, B, D and F.
Chords that are a subset of Eb9sus. These contain less notes but all of them are included in Eb9sus.
In case you prefer a non-interactive variant of the chord chart, we've embedded a PNG image below that shows the notes for the the Eb9sus chord. Feel free to save or share the image as needed.