Don't test your balance and patience in the morning trying to fit the portafilter on the small surface area of the Lunar Scale. The portafilter weigh plate is designed for the Acaia Lunar scale and this sturdy weigh plate is just long enough for a portafilter or a couple of cappuccino cups. Just like all of Acaia's products, this weigh plate is all luxury with a soft-touch finish and a slight magnetic pull for stability.