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