The OL4 is a light-weight, high-performance hazard marker with superior solar energy management. Designed for tough industrial locations such as mines and constructions zones, the OL4 is ideal for marking ground-hazards, fences, barricades and other construction hazards on site.
![](https://www.atonsys.com.ar/wp-content/uploads/2018/05/OL4_Red.png)