Product review (5 stars): Much to my delight, it fit perfectly and I am very satisfied ...
From the reviews I read prior to purchasing, I was convinced that this item would not fit my particular InSinkErator product.  Much to my delight, it fit perfectly and I am very satisfied with the performance and especially the draining capability.  (the ones which came stock with the disposal, would not drain if the adjacent sink was filled with water)  This one works perfectly.