MARVEL UNIVERSE SERIES 4 SKYBOX 1993 FACTORY SEALED TRADING CARDS BOX 36 PACKS. The product is a factory sealed box of Marvel Universe Series 4 trading cards from 1993, manufactured by SkyBox. This box contains 36 packs of non-sport trading cards featuring characters from the Marvel franchise. The cards are made of card stock and come in English language. This collectible item is suitable for ages 4 and up, making it a sought-after piece for fans and collectors of Marvel comics and superheroes. This is NEW OLD STOCK merchandise from a closed collectibles store.