Additional Details ------------------------------ Product description: The Detech 32" Concentric Search Coil for Minelab GPX, GP, SD Series Gold Detectors. By upgrading to this coil you will achieve the best depth and most accurate pinpointing. Search coil is waterproof. World's Largest Concentric Search Coil The Detech 32" Concentric Search Coil for Minelab GPX, GP, SD Series Gold Detectors is the world's largest concentric search coil. While large in size, the coils is extremely light its size weighing in at approximately 2.9 Pounds (1300 grams). Extreme Depth for Treasures and Gold Nuggets This coils is designed for searching deep ground, for relics, deep coins, hoards, weapons, helmets, troves, and large gold nuggets at depth. Because of its large size, the coil is not recommended when searching for very small gold nuggets or operating in very trashy areas. Precision Technology: Handcrafted Design This coil is produced using a combination of the most innovative modern technologies and handmade production techniques. This coil is made from fiberglass, carbon, polyester, epoxy resins and balsa. All materials used are of the highest quality, produced in Germany, Austria and France. The coil is made with a Litz conductor and adheres to all Minelab PI detector requirements. Head Back to Cleaned out Sites Armed with this coil, you now have the best tool for searching deep into the ground at those sites that were previously thought to have been cleaned out. With this coil in hand, all sites previously searched, are now ready to be revisited. Unique Advantages to this Coil: Extremely high level of ground balance Good stability to electromagnetic interferences Excellent discrimination of unwanted targets, better than that of traditional DD coils. In the ?mono? mode, the coil operates with its entire area, unlike dd coils, which operate with half of their surface area.