waste disposal unit

Hi folks, I am shortly moving house and would like to take the Insinkerator Waste Disposal unit to the new house. The unit is fitted to the small bowl of a 1.5 bowl stainless steel sink. What parts would I need to obtain from a plumber's merchant / Screwfix / Toolstation to allow me to remove...

Does anyone know what size the waste outlet (plug hole) is for a ikea stainless steel sink and will an insinkerator waste disposal fit? I am hoping to fit an insinkerator waste disposal unit to a ikea norrsjon sink.