Mini size is perfect for storing underneath espresso machines. The capacity is enough you 't have to empty it too often. Our knock bar made of hard rubber and aluminum, fashionable and beautiful appearance, silicone bar are able to reduce the noise when using, detachable design makes it easy to clean. Widely used at home, cafe shop, canteen, restaurants, and more. Affordable and reliable product for you, it is also a good perfect gift for coffee lovers. For the professional barista as as home users of espresso machines it is essential to a stable and solid knock box for the quick disposal of espresso grounds. size: 150 x 135mm Material: Aluminum alloy colour: White Package Contents: 1 x slag box Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.