Chimney Balloon 23" HEK Handle Valve Extension (For Use with Any Size Add 23" on to the handle length of your Chimney Balloon Allows you to install your Chimney Balloon in a higher location in your flue Easy Installation Feature - the ball valve is at the bottom of the extender Covered by the same warranty as your Chimney Balloon This is an accessory item: Chimney Balloon is not included