Genuine product, unused. I'm selling these because they came up during a warehouse cleanup. They're not that old. A set of 4 high-performance IRIDIUM POWER spark plugs, made by the reliable DENSO. I have 4 sets in stock. - Brand: DENSO - Model Name: IRIDIUM POWER - Model Number: IT20 - Quantity: Set of 4 - Performance: High-performance spark plugs Thank you for looking.