<p><strong>NGK Spark plug SILKGR9A7ES Iridium</strong></p> <p><strong>NGK iridium spark plugs currently represent the highest-quality technological solution. They feature an iridium-alloy on the middle electrode welded on in a special process using laser. One of the world’s hardest metals, the precious metal iridium starts melting at a temperature of 2450°C and is therefore very resistant to spark erosion. By using it, the service life is doubled on average in comparison to standard nickel spark plugs.</strong></p> <p> </p> <ul> <li><strong>Diameter : M12</strong></li> <li><strong>Spanner size : 16</strong></li> <li><strong>Spark Plug : 1 - Earthed Electrode</strong></li> <li><strong>Thread Size : 26.5</strong></li> </ul> <p> </p> <p> </p>
