Vintage Champion Marine Spark Plugs, part number 833M, plug type L78V. This is a new old stock (NOS) boxed set of 4 marine spark plugs. Correct for various marine inboard and outboard engines. These vintage Champion marine plugs are no longer produced and are popular with boat owners and restorers needing exact replacements. Condition: • New old stock, unused • Original box included • Box has shelf wear and sticker residue from storage • Plugs appear unused and original Includes: • (4) Champion Marine Spark Plugs • Original Champion box Please verify compatibility with your engine before purchase.