In-sink-erator evolution Pro excel food waste disposer. 1 hp, dura-drive induction motor. 40 oz. Stainless steel grind chamber and components. Multigrid Plus - three grind stages let you quickly grind virtually any food waste. Sound seal Plus and quiet collar sink baffle reduce noise by up to 60% over standard disposers. Auto-reverse grind system feature. Jam-sensor circuit increases motor torque 500% to break through the toughest jams. Continuous feed operation. 7 year parts and in-home service warranty. Available only to Plumbing contractors.