Leica Trace Rod 80, 80 meter (263ft)A flexible rod used in conjunction with the Signal Transmitter and Locator to trace non-conductive ducts or pipes up to 100mm (4") diameter. Can be used in Line or Sonde mode to trace the route of the duct or a blockage. Rod diameter is 4.5mm (0.2"), Sonde diameter is 8mm (0.3").