NGK Standard Spark Plug Box of 10 (CMR5H)

The NGK Standard spark plug, in its well-known yellow box, uses a solid 98% pure copper core. This copper core is key because it helps dissipate heat effectively and conducts electricity well, allowing for a wide range of operating temperatures. These plugs are built to meet original equipment (OE) specifications, meaning they are designed to perform just like the plugs your equipment came with from the factory. You can count on them for dependable performance over the long haul.

NGK uses a high-grade alumina silicate ceramic for the insulator. This material creates a strong barrier that prevents electrical flashover and also transfers heat away from the firing tip. For easier installation and removal, especially if you need to service them again down the road, these plugs feature trivalent metal plating. This plating gives them superior resistance to corrosion and seizing. Plus, the triple gasket sealing is there to prevent any combustion gases from leaking out, keeping your engine running efficiently.