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Metal Detector TX-850 Search Coil 11.8×15.1'' And 8.3×11'' Underground Metal Detector Treasure Finder Waterproof Search Coil

 8.3×11'' Search Coil is for underground metal detector TX-850;

11.8×15.1''Search Coil  is for Metal Detector DISCOVER deluxe;

These two coils can not share the same control unit,which mean bigger coil works with Metal Detector DISCOVER deluxe;and small coil(8.3×11'' ) works with Metal detector TX-850

12inch coil for TX-850