Fiberglass communication cable marker post: Cable marker stones or boards should be installed inside the cable channel, including cable corner signs, intermediate joint signs, power warning signs, etc. The content of the marker stones and boards is different, but both require the presence of“power cable Excavation is strictly prohibited”、“high pressure danger”The wording and cable routing and type markings can refer to the requirements of the cable construction drawings. Plastic steel and fiberglass marker posts. Scope of application: Plastic steel markers are suitable for:Ground signs for gas, water supply, petrochemicals, broadcasting and television, power supply, communication, and pre embedded optical cables.