NGK #6502
Laser welded Iridium center electrode tip
Platinum disc welded to backside of ground electrode provides long life
Trivalent Metal Plating for superior anti-corrosion and...
NGK #7556
Laser welded Iridium center electrode tip
Platinum disc welded to backside of ground electrode provides long life
Trivalent Metal Plating for superior anti-corrosion and...