Use with our locking stern light base, Item # 50023957. Make use of your stern light base during the day! This 3/4" diameter telescopic flag pole mounts into most two prong stern light bases. Ideal for dive, national and nautical flags! Telescoping feature allows the pole to be raised for maximum visibility. Clam pack with or without 12" x 18" reinforced nylon U.S. Flag. Recommended speed <35 mph. Telescopes from 26" to 48", to fit most flags. Comes with a flag attachment.