The 2021 Topps Holiday Mega Box Relics William Contreras #WRC-WCO trading card is a highly sought-after collectible featuring the rookie player from the Atlanta Braves. This card is part of the Walmart Mega Box Relics insert set, made of card stock with a thickness of 20 Pt. It is a standard-sized card bearing the player's image and details, perfect for fans of Major League Baseball looking to add a valuable piece to their collection. The card is an original release by Topps, known for their quality sports trading cards, making it a must-have for any baseball card enthusiast.