NGK Standard Spark Plug Box of 10 (CMR4H)

This is a box of 10 NGK Standard Spark Plugs, part number CMR4H. These are the same kind of plugs that come as original equipment on many machines, offering reliable performance that customers have trusted for years. They're built with a pure copper core for good heat dissipation and conductivity, and the insulator is made from a high-grade ceramic that's strong and helps with heat transfer. You'll also find triple seals to keep combustion gases from leaking out, and the metal plating helps prevent corrosion and seizing, making them easier to install and remove.

The trivalent metal plating is a notable feature that gives these plugs superior resistance to corrosion and seizing. This means when it's time to replace them down the road, they should come out much easier than plugs without this treatment. The corrugated ribs on the insulator help prevent flashover, which is when the spark jumps to the wrong place instead of firing at the electrode. These plugs are constructed for a longer service life and to maintain optimal performance.