GI Type Camouflage Whistle is made up of plastic. Lanyard string included. Cork ball inside. GI Government Issued type whistle. Contains a small hole at the end to place on neck strap key rings and much more. Pocket size. Printed on whistel: ARMY 8310-00-526-1110. A must for camping, hiking, fishing, backpacking, military personnel, public safety personnel, and law enforcement personnel. Woodland Camouflage GI type Army whistle.