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Extech GRT300 Earth Resistance Testing Kit EXTECH GRT300 The Extech GRT300 earth testing kit includes all hardware necessary to measure earth ground resistance in 4 ranges from 2 to 2000 Omega Supplied with test leads with alligator clips 4 x auxiliary earth bars hard carrying case and 8 x 1 5V AA batteries Extech GRT300 Earth Testing Kit
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