About This FAST PROCESSING - Quickly and easily dispose of used coffee grounds from of your espresso machine. PERFECT SIZE - The 4.8-inch compact size is ideal for storing under most espresso machines, and is more suitable for home and office making coffee. The knock box of the espresso machine is large enough that you don't have to empty it often. HIGH QUALITY - The newly upgraded metal rubber knocker will not dent or scratch your portafilter, and will help to avoid overflow. The three-dimensional coffee bean pattern on the knocker will add beauty and make your coffee knock box no monotonous . DETACHABLE KNOCK BAR - Rubber bowl can be removed from its plastic stand for emptying and cleaning. STRONG STABILITY- The wide rubber base provides excellent stability to prevent slipping and tipping without scratching the table. Overview Brand : HOMEE Capacity : 4 liters Color : Round Product Dimensions : 5"D x 3.9"W x 3.9"H Special Feature : Coffee Grinder