Omnihive 1000+ Xenoskin - GreyOmnihive 1000+ Xenoskin Grey The ultimate spacious and flexible box for storing large collections. This box can hold more than 1000 double sleeved cards or carry multiple decks and or Play Mats plus other Ultimate Guard products like the Sidewinder 133+. Two removable, magnetic, adjustable and stackable trays make this box unique: its adaptable for all kinds of games and formats and enables multiple different ways of storing and using your collection.