54mm Diameter - Designed to fit baskets of 54mm Breville Barista Pro and Breville Barista Espresso Machine models. Precise Pouring – A bottomless portafilter is an important piece of equipment that aids in diagnosing espresso extraction issues. Allowing you to watch the entire extraction process. Premium Made – All Anodized Aluminum handles have been manually lathed with expertise and unparalleled quality finish. Ergonomically Shaped – Comfortable fit in the hand, these handles will feel light and extra smooth even after a long day behind the bar. Fits any baskets – As there is no bottom, there is no limit to the size of the basket you can use. Overall, upgrading your brewing experience.