Perfect design--The opening of this measuring cup is 54mm, which is comparable to for 54mm Portafilters are perfectly compatible with 54mm /Bottomless Portafilters. Reduce coffee powder spillage and bid farewell to messy workbenches. High-end metal-made of high-quality aluminum alloy, durable, wear-resistant and corrosion-resistant, and added with food-grade coating on the surface, which is more reliable and to use. Compatibility-For FIXA 54mm measuring cup and Barista Express, Barista Infuser, Barista Touch, Barista Pro and grinders including Smart Grinder Pro and Niche Zero are compatible. Colour: black Material: aluminum alloy Size: Height: 7.8cm Package Contents: 1 * Coffee cup Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.