Cast iron electric motors are available in sizes 160, 180, 200, 225, 250, 280, 315, 355, and 400 with a power capacity of 4kW, 5.5kW, 7.5kW, 11kW, 15kW, 18.5kW, 22kW, 30kW, 37kW, 55kW, 75kW, 90kW, 110kW, 160kW, 200kW, 250kW, and up to 500kW. These drives are available in different speeds, i.e., 2, 4, 6, and 8 poles. They are of course available as energy-saving motors in IE1, IE2, IE3, and IE4.