NGK G-Power Spark Plugs Precious platinum material was used at the tip of the center electrode of diameter- 0.6 mm. The uniquely shaped ground electrode & platinum alloy center electrode reduces the wear rate of the electrode more than a conventional plug and hence give longer life. NGK G-Power Platinum Spark Plug Features Precious Platinum material is used as a tip of the center electrode of diameter- 0.6 mm Quick starting and best ignitability in all conditions. Long and better life of electrodes. Faster acceleration with good mileage. Reduce the wear rate of the electrode than the conventional spark plug.