Fillers are used to create a rounder and smoother structure to the cable and a cleaner effect and to fill the empty space inside the cable. Fillers will increase flexibility, protect the insulation or coating, and ease the production process. Fillers are often made of PVC.

Khorram Plastic Company of Tehran has been able to be one of the pioneers and the first producers of cable fillers in Iran by applying modern technology and knowledge and complying with existing standards in the field of filler production.