The 53mm dosing cup can be exactly scale the coffee beans and the coffee grounds, to help the barista making a perfect coffee. No coffee wasting, Compatible with Sage Barista Express, Barista Touch, Barista Pro. Espresso dosing cup 54mm fits perfectly on the 54mm portafilter, it is good collection to sage coffee machine accessrioes. 54mm coffee dosing cup made of aluminum metal can be easily cleaned with water. The product is very high quality with the important auto Built-in dosing tab meaning you just push it to start the grinder and it stops automatically. Its strong, light and coated very well, measuring dose before and after grinding, Invert over portafilter when done and tap and its nicely in your basket ready for distribution and tamping. It has made your coffee preparation completely mess free, Perfect for dosing and keeping the coffee machine clean and tidy. Great addition to the Breville/Sage Barista Express/Barista Pro portafilter, Also ideal for dosing from a different grinder.