Make use of your stern light base during the day! This 3/4" diameter telescoping flag pole mounts into most 2 prong stern light bases. Telescoping feature allows the pole to be raised for maximum visibility. Telescopes from 26" to 48" to fit most flags. Comes with flag attachments. Clam pack with or without 12" x 18" reinforced nylon U.S. flag.Use with sure fit collar part # 50023957.