The coil is fully waterproof

maintaining stable operation where concentric coils struggle

This extension cable transforms how you can use your Minelab detector

This coil works with all Minelab X-Terra models - the 305

CORS Giant 15” x 17” DD Coil for Fisher F2 & F4 Detectors security case The coil is fully waterproofCORS Giant Search Coil for Fisher F2 and F4 Metal Detectors The Search Coil used by Professionals and Serious Detectorists! The CORS Giant Search Coil is the deepest coil in the world for different metal detectors and is confirmed by tests of independent metal detector experts in various forums and metal detector meetings. It is recommended to use the coil for deep searching. This coil is excellent for finding large targets as well as for small