The THERADOT Lead Wire is a 60-inch lead wire that is compatible with the THERADOT Deep Oscillation Therapy Device. This wire is a direct replacement for the ones included with the original purchase of a THERADOT unit. It is advised that lead wires be replaced if the unit is terminating mid-treatment, or if there is no output. This gray lead wire is meant to be used for the applicator or titanium element. It comes in a pack of 2 and is sold separately from the THERADOT unit.