Sending flute within Republic of Ireland

For sending a flute insured within Ireland who would you use.

Hi, I recently had my Eamonn Cotter serviced and a crack repaired - he said normal post was fine and it worked for us back and forth, wasn’t even registered mail! As long as it’s well wrapped up it’ll be grand I think. but if you want to take more precaution then I guess registered mail might suit?