10 Packs Genuine NGK 5921 BM6A (7421 BMR6A) Spark Plug Trimmer Edger Copper Core
NGK standard plugs are constructed for longer life and optimum performance.
Trivalent metal plating provides superior anti-corrosion and anti-seizing properties
Corrugated ribs prevent Flashover
Pure alumina silicate ceramic Insulator, provides superior strength and better heat transfer
Copper Core aids in heat removal
Triple seals prevent leakage
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