From the publisher's website:
Lay claim to the high seas with a scallywag’s stockpile of weapons, magic items, and other plunder. The riches of pirate kings and lost empires awaits discovery in the Skull & Shackles Pathfinder Adventure Path. This 54-card set of beautifully illustrated, full-color item cards allows you to track your newest and most dastardly treasures in vibrant detail.
GameMastery Item Cards allow heroes to keep track of their equipment in style, and this deck is completely compatible with all of Paizo's other GameMastery Item Card sets. Each of these full-color cards features a beautiful portrait of an item on one side with space on the back to keep notes. GameMastery Item Cards are compatible with any fantasy roleplaying game.