This 2021 National Treasures Dan Marino Mark Duper Synced Dual Autograph Auto #4/49 trading card is a must-have for any Miami Dolphins fan or sports card collector. The card features two autographs from the legends Dan Marino and Mark Duper, and is made of high-quality card stock material.

It is an original card manufactured by Panini in the United States, and is part of the 2021 Panini National Treasures set. The card is serial numbered and is a short print, making it a rare and valuable addition to any collection. With its unique features and authentic autograph authentication, this card is a true gem for any sports enthusiast.