I purchased these to install in a Hilux Surf, but they are no longer needed, so I am selling them. They are new and unused, but have been stored for a long time. I opened one for the purpose of taking photos. IRIDIUM TOUGH is a high-performance spark plug that maximizes engine efficiency. - Brand: DENSO - Model Name: IRIDIUM TOUGH - Model Number: VK16 - Quantity: Set of 6 - Performance: High-performance spark plugs Thank you for looking.