 Portable dishwashers exist in 45 and 60 cm (Europe) or (US) widths, with casters and attached countertops.There are also dishwashers available in sizes according to the European gastronorm standard.Dishwashers may come in standard or tall tub designs; standard tub dishwashers have a service kickplate beneath the dishwasher door that allows for simpler maintenance and installation, but tall tub dishwashers have approximately 20% more capacity and better sound dampening from having a continuous front door.