This DB Electrical AMN0024 Alternator is a high-quality replacement part for your Mercruiser Mando. It fits models 20057, 60060, and 400-46009, and it's new old stock (NOS), meaning it has never been used before. The alternator is made by DB Electrical, a reputable brand known for producing reliable and durable automotive parts. The unit type is a single alternator, and it comes with the necessary components for easy installation. Please note that this is not a universal fitment, so make sure to check the compatibility with your vehicle before purchasing. California Proposition 65 Warning: Cancer and Reproductive Harm. Exact item is shown. New with partial original packaging. Made in China. No returns if installed. This item is a new, opened customer return. It has been inspected and passed quality control to insure the condition described and contents are accurate. Please review actual photos as stock photos are not the actual item, our photos are. Please review our business policies in our store for information regarding returns, shipping and warranties.