SE PH23-12 Keychain Brass ID Holder with Vial (12 Piece), 1-3/4" 12 pc ID holder for carrying ID's, emergency contact information, or small items Material: brass body with round bottom Id holder has an O-RING seal Includes waterproof plastic clear container/vial with screw on cap 1" x 1/4" Dimensions ID holder: length 1-3/4" x diameter 1/2"