HYY telephone cable

4.Sheath :the technical spec of PVC sheath material is up to the standard of GB8815

3.Line pairs:every two insulation conductor strands into pair according to the stated chromatogram.

2.insulation:adopt one of flame retardant polyethylene,PVC and polyethylene according to different moel,

1. Adopt soft round copper wire as conductors, whose diameter includes 0.5, 0.6. 0.8mm