High Quality Coffee Knock Box - Made of special ABS material to prevent bacterial growth from the Inside. It is durable, non-slip, keep clean at all times for easy cleaning. The wide rubber base provides excellent stability to prevent slipping and tipping without scratching the table. Special Design - Metal rubber bar and plastic body are able to reduce the noise when using. Detachable metal rubber bar makes it easy to clean. Deep bent design makes coffee slag not easy to splash while oblique mouth allows you to use more convenient. Our Coffee Knock Bar made of rubber and metal, it is more durable and easier to use than ordinary rubber Knock Bar. Perfect Size - The size is perfect for storing underneath most espresso machines. The capacity is large enough that you don't have to empty it too often. Easy to Clean - The knock box and knock bar are dishwasher safe, save your time on the washing the coffee tool. Affordable and reliable product for you.