<p><strong>NGK Spark plug SILZKFR8F7S Iridium Replaces 0001590500 A0001590500</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&rsquo;s hardest metals, the precious metal iridium starts melting at a temperature of 2450&deg;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><strong>Diameter : M12<br /></strong><strong>Spanner size : 16<br /></strong><strong>Spark Plug : 1 - Earthed Electrode<br /></strong><strong>Thread Size : 26.5</strong></p> <p>&nbsp;</p> <p>&nbsp;</p> <p>&nbsp;</p> <p>&nbsp;</p> <p>&nbsp;</p>