When it came time to install, the insert item was not in the box.  It is pictured in the item images and in the questions answered section a Wayfair employee says it is included.  It is not.  You have to buy that item (LT36) separately.  Now I am having to rush an order for this part and my installer has to come back another day.  Because of this delay, I am not sure how this works yet, but I am not happy.