54 mm diameter, small and exquisite, fits most coffee makers for making coffee. Compatible: Breville. With this powder cup, you can easily maintain the coffee grinding performance of the grinder and promote coffee extraction. Suitable for milk tea shops, home, coffee shop, etc. It is also a good for coffee lovers. Adopts high-quality stainless steel, is non-toxic and harmless and can come in direct with food. It is rust-proof and durable, easy to clean, just rinse with water or put in the dishwasher.