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How to build a Surf PI 1.2 pulse induction metal detector from a DIY kit. | Be cheap and DIY:
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GR-200 Long Range Gold Metal Detector Kit Pulse Induction Digital Display 100m + Suitcase w/Case for Gold Silver Long Range Gold Silver Gem Diamond Treasure Detector Finder - Walmart.com
How to build a Surf PI 1.2 pulse induction metal detector from a DIY kit. | Be cheap and DIY: