3M Ball Marker 1405-XR, EMS 6 ft Extended Range, Gas

The 3M EMS Long Range Marking Ball is specially designed to locate embedded installations that are covered by an embankment. It is affixed to the underside of non-metallic covers or covers on recessed installations. This self-alignment marker provides positive identification of facilities. 3M EMS Marking Ball provides an effective way to mark underground facility lines. This ball marker works efficiently without any external power source.