Mercian's Pilot Prera Iro-Ai pens

These three pens were - very generously - gifted to me this month.
And I am very grateful to have received them 😊

All three are Pilot Prera Iro-Ai pens, but they have different grades of nib on them.

L→R they are:

Green pen with 'EF' nib;

Black pen with 'F' nib;
Red pen with 'M' nib.

These are the first pens I have owned with round-tipped Japanese 'EF' or 'F' nibs.
I am keen to ink them up and experiment with them, to see how tiny I can make my writing, whilst retaining legibility 😊