Copper-glass seal bonds insulator, terminal post center electrode together; assures full required voltage at spark gap; gas-tight seal (100% leak proof)

Multi-rib insulator reduces danger 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

Verify all cross reference listings before purchase