FunctionObserve your espresso shots without having to crouch down. You can see portafilter and how clean the group head is making. It makes clean up and maintenance super easy. Design At the bottom of the mirror is a magnet which can be firmly attached to the coffee machine without shaking. 360 degrees ball allows for adjusting the angle you need. Size 2.5" round mirror, suitable size. Putting it on the coffee machine will not affect your coffee making, but it is enough to see the filter clearly. Material The frame is made of Smooth wood, simple and stylish. If coffee spills on the mirror, just wipe it with a wet paper towel to clean it up. Easy to clean. Application This is a small coffee accessory for baristas at cafes or at home. It is also very suitable for seeing small and inconvenient places.