Product review (1 stars): Don't buy one, it may be free?
I read online if you bought a ISE disposal and it has this on it all you need to do is call ISE and tell them the new disposal is not draining water correctly from the sink, they will send this out free. I have not needed it as my ISE cracked at the bolts of the seem and started leaking like a sieve after 4 years like many others noted. I only learned about this baffle upgrade after reading sites on ISE problems and thought I'd pass it on.
 I'm going to buy another brand as ISE has too many issues now days, mainly cracks & leaks.
  Hope nobody else's fails just after warranty is over but it seems from what I read ISE has the warranty timed right before failure time so they know these units lifecycle very well.
  Insinkerator disposals just are not made like they once were by all means and their prices today for the high end ISE homeowner models will get you a lifetime warranted and maybe even a true restaurant commercial model from other makers if you look around.
 I wish you the best of luck with them...