The E flat suspended second chord is a 3-note chord consisting of the notes Eb, F and Bb.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as Ebsus2.
Chords that are a superset of Ebsus2. The chords include more notes but always Eb, F and Bb.
Chords that are a subset of Ebsus2. These contain less notes but all of them are included in Ebsus2.
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 Ebsus2 chord. Feel free to save or share the image as needed.