Telescoping Flagpole Single Flag Top Harness (Top: 1-3/8 in. Inside Diameter) These are designed to fit the outside diameter on 16 to 20 ft. telescoping poles. Replacement Top Harness: 1-3/8 inch Inside Diameter See the variation for the Bottom Harness for these poles 1-13/16 inch inside diameter. Hooks/clips sold separate.