Translation of "Fibers" in German

Why is it that there are so few fibers?

Warum sind da so wenige Fasern?

We're working on trying to put more fibers inside the cable

Wir arbeiten daran,

Fiber-optic cables are made up of tiny glass fibers which are as thin as human hairs.

Glasfaserkabel werden aus winzigen Glasfasern hergestellt, die so dünn sind wie menschliche Haare.