Compared to traditional DD coils, the patented SEF coil technology provides you with more stable operation, better ground balancing and the most accurate target identification. Search coil is waterproof and coil cover is included. This item is in the category "Business & Industrial\Test, Measurement & Inspection\Test Meters & Detectors\Metal Detector Accessories". The seller is "bigfishboy" and is located in this country: US. This item can be shipped to United States.