FYORMU Micro is a fibre optical cable for microducts. The cable has a core tube and under the sheath of the cable aramide yarns act as strength elements.

This type is also known as 

  • A-D(ZN)2Y 4mm Micro (VDE 0888)
  • GRGLDV 4mm Micro (S12)


  • Optical fibres: Coloured single-mode fibres according to the ITU-T G.657.A1 standard.
  • Secondary coating: A plastic core tube with jelly filling.
  • Strength members: Aramide yarns under the sheath.
  • Outer sheath: The cable sheath consists of UV resistant black polyethylene compund (HDPE). Nominal sheath thickness is 0,4 mm.
  • Sheath marking: Marking printed on the sheath at one meter interval: Nestor Cables - cable type - lot number - year of manufacture - length marking.

All of our fibre optic and copper cables are halogen-free.

STK* Nestor code Size Max. diameter  Weight  Length  Drum
0217313 L10422


4 mm 13 kg/km

4000 m

0217314 L10527 1x6xSML 4 mm 13 kg/km

4000 m

0217315 L10519 1x12xSML 4 mm 13 kg/km

4000 m



*Clicking on these numbers will take you to the product page on the Finnish STK service.

FYORMU Micro 4,0 mm


Max. tension during installation

300 N

Crush strength with 100 mm plate

1 000 N

Temperature range during operation 

-30 - +60 ºC

Temperature range during installation 

-15 - +60 ºC

Reaction to fire (CPR)

Minimum bending radius

During installation 20 x diameter, installed 15 x diameter