These anode hooks are made for 1.5" or smaller anode bars.
*Hook length is measured from the inside of the hook where it sits on the anode bar to the top of the threads. For example...A 6" hook has an overall length of ~7.5". The threads are 1" and the top of the hook is about 0.5", so you add both of those to the ID length of 6" and the total is ~7.5".
