Minelab 6" 18.75 kHz DD Coil for X-terra 
Application
 Suitable for X-TERRA series metal detectors (except X-TERRA 30). This high frequency (18.75kHz) lightweight waterproof Double-D coil is extremely sensitive to sub-gram gold nuggets, specimens and gold jewellery and has excellent target separation in areas littered with junk.
Compatible Metal Detectors
 X-TERRA 705 Gold Pack
 X-TERRA 705
 X-TERRA 505
 X-TERRA 305
 X-TERRA 70
 X-TERRA 50
Water Protection
 Water proof: Submersible to 1 meter. Ideal for shallow wading at the beach, or detecting in shallow streams.