Bosch Double Platinum Spark Plugs are engineered for up to 3X longer service life. GENUINE BOSCH SPARK PLUGS . Double Platinum Spark Plugs. Laser welded Platinum inlay ground electrode provides 3X longer service life .
First off the photo in this auction is not what I received. I received plugs with the correct blue lettering that said "Double Platinum" on their sides. I drive a 2005 Mercedes CLK320 with 102,000 miles. Definitely a performance upgrade. Glad I went with Bosch.