NOS 10 Vintage Original Firestone Spark Plugs E-40-F Radioactive Electrode

The product is a set of 10 vintage original Firestone spark plugs with a radioactive electrode design, model E-40-F. These collectible spark plugs are a rare find for vintage car enthusiasts and collectors alike. The unique design and historical significance of the radioactive electrode make them a valuable addition to any automobilia collection.