The product is a United States 10-cent coin featuring the Mercury design. It is part of the Mercury Dimes series minted between 1916 and 1945. The title "Knockout Kings 2003 Gamecube Used" suggests that it may be related to a video game for the Gamecube console released in 2003, possibly indicating a unique or special edition coin that was part of a promotion or giveaway for the game.