This is an authentic CARTIER Platinum Happy Birthday 4mm Band Ring 48 4.5. The ring is crafted of platinum and has the Cartier logo engraved in a staggered style throughout the band. Perfect for every day wear, enjoy this ring with it's timeless appeal only from Cartier! Follow this item for alerts. Cartier is a registered trademark of Cartier. FASHIONPHILE is not affiliated with Cartier.