For the Minelab MANTICORE
The 15 x 12-inch elliptical Double-D M15 coil is waterproof to 5 m (16 ft) and provides maximum depth for specialised treasure hunting. It is also great for wide ground coverage in open spaces. The M15 coil weighs 650g with the included protective skidplate, bringing total weight of the MANTICORE detector to 1.45kg with the M15 attached.