Kitchenaid KBC90N bowl cover (household goods)
I use the 4.0, 4.5 and 5.0Qt - American unit Quart - (or 3.0, 4.28 and 4.83 liters) bowl and the lid fits both 4.5 and 5.0Qt bowl. Deepening actually serves that the lid can also be used when the bowl is locked in the machine. I have to disagree here