Extreme life NGK plug. NGK has designed an unusually long-life spark plug by using the highest platinum concentration in the industry. The center electrode has a laser welded platinum tip, while the ground electrode has a laser welded platinum tip. The center electrode has a taper cut, which gives it a unique look. Genuine NGK Component OE Platinum spark plugs offer high ignitability and longer service life. NGK PZFR7G-G / PZFR7GG / 4253 Laser Platinum Spark Plug Dual platinum surfaces ensure a gradual wear rate, resulting in a stable idle, enhanced anti-fouling, increased fuel efficiency, and fewer emissions. Key Features: The platinum center electrode tip has been laser welded. Long life is provided via a platinum disc soldered to the backside of the ground electrode. Anti-corrosion and anti-seizing properties are enhanced by trivalent metal plating. Faster acceleration and faster starts. Lower emissions and better fuel economy. The best platinum spark plug on the market. The manufacturer has given his approval for the design. Product Details: SKU: 86-4253 UPC: 087295042533 Weight: 0.15 LBS Brand: Autowares