DENSO IRIDIUM POWER spark plugs, set of 3 for L350S/L360S. - Brand: DENSO - Model Name: IRIDIUM POWER - Compatible Vehicles: For L350S/L360S - Quantity: Set of 3 - Engine Type: EF-DET, EF-VE - Manufacturing Years: 2003/11 - 2007/12 Thank you for viewing. The lifespan is 100,000 km, but they've only been used for about 10,000 km (^^) The black stains can be cleaned off, so there's no problem at all (^^) These were used in a Tanto. For those who purchase, I ship within 24 hours, and sometimes within a few hours, so thank you (^^) Please note that the box is from a different product.