Genuine ISE spare part
ISE disposer brushed stainless steel type push button and bellows kit with interchangeable polished chrome bezel included.
Easy fit In-Sink-Erator (ISE) air switch push button kit, part that fits in the worktop you press to make the ISE disposer work. Air operated,  1 1/4" diameter hole. Fits other badged makes and models of air switches, including Franke.
Fits ISE models:
Evolution 100
Evolution 200