The rods are made of fiberglass coated carbon rods.
This carbon rod is a technical material which is soft, flexible and unbreakable, no special care is needed. (Similar rods are applied for fiberglass tent poles)
rod thickness: 4mm
rod length: 3cm
necklace length: 41cm 3cm (adjustable)
box dimensions: 6cm x 6cm x 1.5cm