Product review (5 stars): Great item!
The original sound baffle disappeared one day (I think my house cleaners accidentally pushed it down into the disposer and ruined it, or threw it away  - will never know!) I looked at Home Depot but they didn't carry the replacement, so Amazon, here I come! Fits in perfectly above the permanent rubber gasket in the disposer - just push it down in and it sits perfectly. Does reduce the sound probably 50%, and REALLY helps prevent utensils from accidentally going down inside the disposer.