Material: Our knock box is crafted from high-quality stainless steel, ensuring durability and resistance to deformation. The knock bar is also made of stainless steel and is wrapped in rubber, preventing dents and scratches on your portafilter while effectively eliminating spills. This design keeps your portafilter safe and secure during use. Size: Designed to fit most espresso machines, our dump bin has a diameter of 4.5 inches and a height that ranges from 3 to 4.5 inches. It conveniently fits onto the drip tray, maintaining a tidy and organized workspace, always ready for use. Features: The innovative design allows coffee grounds to fall directly into the knock box when the portafilter is knocked off, while the raised rear wall prevents splashes, eliminating the need for countertop cleaning afterwards. The knock bar is removable for easy cleaning. Easy to Clean: Cleaning is a breeze! You can wash the knock box by hand or place it in the dishwasher, saving you time and effort. Package Includes: - 1 x Coffee Knock Box - 1 x Bar