Works in Cleito Exo tank...barely and/or almost. The positive pin does not reach down quite as far as the threaded pin of normal coils, making the rba a tad shorter than a stock coil. So, what happens is...when refilling from the top, you have to push down real hard to get the top cap screw threads to catch on the top of the rba...what this does is...pushes juice up into the deck causing horrible flodding. I've seen one youtube fix that says to completely fill juice channels with cotton. Haven't tried it yet.