Description: The coffee knock box solves the extremely messy problem of removing the used grinds from your coffee machine or group handle. The knock boxes are used to knock out to the spent ground coffee out of the filter handle, so the next espresso can be prepared. Keep the mess in the box, and the flavor in the cup. The knock box should be cleaned minimum once per day or when full. Features: Heavy duty stainless steel construction for professional use, which is resistant to rust and easy to clean. Using deep bowl design capacity is big, coffee grounds are not easy to splash. The size is perfect for storing underneath most espresso machines. Replaceable protective rubber bar has very good buffer performance, protect the coffee machine controller. It's the ideal accessories of household and professional coffee machine. Specification: Condition: 100% Brand New Material: Stainless Steel Color: Silver Product Size: S, M (Optional) S: Approx. 17.5 x 16 x 9.5cm / 6.88 x 6.29 x 3.74inch L: Approx. 16 x 17.5 x 15cm / 6.29 x 6.88 x 5.90inch Product Weight: Approx. 437g~544g Package Included: 1 x Coffee Knock Box with Rubber Bar Note: 1. Please allow 1-2 cm error due to manual measurement and make sure you do not mind before ordering. 2. Please understand that colors may exist chromatic aberration as the different placement of pictures.