SICURIX Horizontal Black Plastic Card Dispenser holds ID cards up to .30mil thickness, that's around 30 cards. The maximum card insert size is 2-1/8 x 3-3/8 inches. The dispenser provides protection and easy access to your ID, credit cards or business cards. Each card holder has a die cut hole in the back so it attaches easily to card reels, lanyards and chains. They are great for Mifare, mag striped and other ID cards. The notched lip gives you quick and easy access. This pack contains 25 horizontal, black card dispensers.