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Amazon.com : Fisher Labs Research Labs F11 All-Purpose Metal Detector with 7 inch Concentric Elliptical Waterproof Searchcoil, 7.69 kHz. Operating Frequency, Red : Patio, Lawn & Garden
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Amazon.com : Fisher Labs F22 Weatherproof Metal Detector with 11 Inch Weatherproof Coil, All-Purpose, High-Sensitivity, Deep Seeking Metal Detector, Pinpoint, Easy to Use, Red : Patio, Lawn & Garden
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