The 3M™ EMS Ball Markers have a self leveling design providing accurate, horizontal position regardless of how the ball is placed in the ground , making the job of precisely locating underground facilities easier.
Long lasting passive antenna encased in waterproof shell helps identify underground facilities for years to come. All markers function without the need for an external power source.
The iD Markers can be programmed to include customer-specific information about the asset, such as the facility owner, conduit size, placement date, and other important details. The 1421-XR/ID Ball Markers are used in the Telecommunications industry.