I'm sorry but I don't know how to say in english the "blocks" that often are installed on the headstock of a guitar. Often they are two. They stretched down the D and G strings (the first one) and the B and E strings (the second one).
Thanx for your help!

String " T " or string guide.

That's you mean ?

Fais beau en Espagne ?

String guide.

Merci! Oui, je crois que en Espagne il fait beau mais je suis sure que en Heidelberg il ne fait pas beau...

Oh ! La France , rien a voir avec l'Espagne à ce que je comprend StephenMadrid !!!!!

Dans la page d'acceuil , il y a une section en français tout en bas où on t'aurais renseigner. Tu connais ?

I've always called them "string trees" and my repair guy never laughs at me.
Of course, he may just be polite.
YMMV

Cheers

Not wrong it could look like a tree too

Yep...String Trees. That's what Fender call them, so I'd go with that.