MAR 100-LQ is a self-leveling underground marker designed for narrow excavations. The biggest advantage of the MAR 100-LQ is the self-leveling construction. This greatly simplifies the installation of this marker. The robust outer PE casing provides it with high resistance to mechanical damage and gives it protection even in the harshest conditions. The two holes on the sides of the marker cover are for the eventual attachment of the MAR 100-LQ to the liner by means of fixing strips.