3M™ Extended Range 1.5 m Disk Markers provide an easy and accurate method of locating flush mounted facilities which become covered by backfill or other obstructions, such as snow or vegetation.
The disk marker has a diameter of 10 cm and is easily fastened to the underside of non-metallic lids or covers over flush-mounted facilities, such as hand holes, manholes and other grade level enclosures during construction and maintenance. Disk Markers are not intended for direct burial. The iD version allows additional data to be stored to the marker.