Purchased from Monotaro on 9/10 (invoice image attached) Although cheap, inferior products are sold online, this is a genuine product. https://youtu.be/9TbLDpw1BHE?si=Eo2E23-TCo0TzZOS I've included a YouTube link, please watch it. I installed it once, but the heat range didn't match, so I repurchased and am now selling this one. It was used after installation and removed on the same day. It's almost new. I can confirm that it is not an inferior product. *Please confirm the compatible vehicle models and heat range, etc. Please ask if you have any questions. Next-generation high-performance spark plugs, designed to improve ignition and combustion efficiency. - Brand: NGK - Model: LKAR7ARX-11P - Quantity: 4 pieces - Features: Spark plugs that provide high ignition and combustion efficiency Thank you for viewing.