3M™ Ball Marker with an extended range of 1.5 m is specially designed for locating flush mounted facilities that are covered by backfill. It is affixed to the underside of non metallic lids or covers over flush mounted facilities. This self align marker offers positive identification of facilities. In addition, the iD version enables writing/reading data into/from the Marker.

• Self-leveling design for precise and horizontal positioning
• Offers easy marking of buried power lines
• Passive antenna encased in water-resistant polyethylene shell
• Withstands a temperature range of -20 to 50 °C (-4 to 122 °F)
• Works without any external power source