It is a stick underground marker of small dimensions. The design of the PIN Marker provides the possibility of its detection in both vertical and horizontal positions.

For optical networks, the PIN Marker 130/100 is designed so that it can be directly attached to a 7/4 mm microtube using an optical coupler. It can be attached to other sizes of microtubes using reducers.

In other applications, it is ideal for marking important points at shallow depths.