The Hunter Coil is 12.5" long x 8.5" wide and designed to search areas heavily littered with iron and other trash debris. This DoubleD coil is unusually light for its size and weighs in at 17.2 Ounces, 490 Grams with coil cover. Easily search for a whole day! The coil has good sensitivity to large, medium and small targets. Very easy to use and is recommended as a replacement for standard coils. The coil is waterproof and fully submersible, the body is filled with epoxy resin. Additionally a black protective coating, the same as used on marine boats, makes it possible to use the coil without coil cover. The coil copes excellently with high and medium soil salinity. One of the best coils for metal detecting for jewelry on beaches. Recommended for professionals and amateurs! Includes coil cover, hardware and Velcro cable strap. 2 Year Warranty. For use with the Quest Q20, Q40 Metal Detector. View detailed product specifications and graphics.