The Mercury TECH SERVICES MEDIA tsm Mercruiser Corrosion DVD TS1 is a genuine/original DVD produced by the brand Mercury. This DVD features educational content on the subject of media, specifically focusing on corrosion prevention techniques for Mercruiser engines. The author is Mercury, ensuring that the information provided is accurate and reliable for those interested in learning about maintaining and protecting their marine engines. This DVD serves as a valuable resource for individuals looking to understand and address corrosion issues in their boat engines.