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Copper-glass seal bonds insulator, terminal post center electrode together; assures full required voltage at spark gap; gas-tight seal (100% leak proof)
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Multi-rib insulator reduces danger of flash-over
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One-piece terminal post adds strength
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Resistor reduces radio frequency interference (RFI) and electrode erosion
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Cold-formed steel shell precision rolled threads
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Full copper core electrode provides better performance in all conditions
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Verify all cross reference listings before purchase