Wow!  Who knew one could get so excited about receiving a toilet canister replacement seal in the mail?  This is my first experience with these phenomenal rings, and I confess I handed them off to an experienced professional. He too was ecstatic at the quality and nodded knowingly - yes, Kohler is the perfect choice for your Kohler toilet. We baked a cake and celebrated, flushing the toilet repeatedly.  An amazing day overall. Thank you Kohler!