The small coils are great for high density trash areas, highly mineralized soil and hard to reach tight spots. The big coils go 10-20 percent deeper and cover a lot more ground with each sweep. All are completely waterproof. All Fisher search coils are electrostatically shielded and waterproof, plus all Fisher accessories purchased separately (including coils) carry a 90 day warranty from the factory.
- 4" in Diameter
- Push-In Connector
- 90 Day Factory Warranty
- Compatible with Fisher F2 and F4