SE PH22-48 Display Waterproof Aluminum ID Holders with Key Ring (Set of 48) Set of 48 waterproof skinny container for carrying IDs, emergency contact information, small items, and more Plastic coated interior Material: aluminum body with round bottom Assorted colors: black, blue, green, purple, red, and silver (no color choice) Dimensions: length 2-3/4" x diameter 1/2"