The 3M™ EMS Ball Markers have a self levelling design providing accurate, horizontal posiiton regardless of how the ball is placed in the ground , making the job of precisely locating underground facilities easier.
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.