This product is a set of 50 transparent card protectors sleeves designed to fit 3 x 5 cards, specifically made by the brand Rolodex in the United States in 1989. These sleeves serve as a way to protect and store business cards or other small cards in a Rolodex system, keeping them organized and in good condition. The transparent design allows for easy access and visibility of the cards while providing a secure fit to prevent them from getting damaged or misplaced. Ideal for office and business use, these card protectors are a practical and nostalgic desk accessory.