Make the job of precisely locating underground facilities easier. 3M™ EMS Extended Range Ball Markers have a self-leveling design that provides accurate, horizontal position regardless of how it is placed in the ground.
The 3M™ Ball Marker provides an effective way of marking underground facility lines. This passive underground marker with a water resistant polyethylene shell does not react with any chemicals or minerals. This ball marker effectively operates without the need for any external power source.