The 2026 Topps Series 1 75th Anniversary Mascots Slider Guardians Baseball #M-25 card is a limited edition sports trading card featuring the iconic Slider mascot from the Washington Nationals. This standard-sized card is made of card stock and is part of the 2025 Topps Series 1 set. It is an original insert with the card number M-25, making it a sought-after collectible for baseball fans and card enthusiasts alike. The card pays homage to the Major League Baseball league and showcases the unique mascot in near mint or better condition.