9 " 3kHz Coil (Concentric) for X-Terra 70's, 505's & 705's

This optional 3 kHz high frequency 9" round concentric searchcoil will only work on the Minelab X-Terra 70's 505's, 705's models. It will not work on the X-Terra 30's, 50's or X-Terra 305's. The low 3 kHz frequency is ideal for enhancing the signal on si