The product is a lot of 4 Volvo Penta spark plugs with the manufacturer part number 876077-9. These spark plugs are made in the United States and do not come with a warranty. Designed specifically for boat parts, this product falls under the category of sterndrive motors & components, as well as ignition & starting system parts. Ideal for those looking to replace or upgrade their boat's ignition system, these spark plugs are a reliable choice for Volvo Penta engine owners.