Recon its FH-5's from on here (says it was sold private on his forsale posts but the discription is the same!)
"Brand new 2.66KG custom super lightweight steel flywheel from Mayes motorsport (will knock more than a second off 0-60 times - amazing acceleration modification, one of the best Micra modifications and contrary to what most people think, THIS DOES NOT EFFECT DRIVEABILITY - I DID NOT STALL FOR A WEEK AFTER HAVING IT FITTED"