This espresso knock box is a compact container for used coffee pucks and grounds during daily brewing. It works well as an espresso knock box, coffee knock box, or knock box espresso accessory for home and office coffee stations that need a smaller, tidier setup for puck disposal. The set includes 1 knock box, 1 removable knock rod, and 1 silicone tamper pad. To use, place the knock box on a flat surface and tap the portafilter basket against the rod to release the puck. Lift the rod out when needed for rinsing and reinstall it before the next use. This coffee grounds knock box helps keep used grounds more contained and may fit under many home espresso machine setups. Specs: body material ABS; tamper pad material silicone; color black; knock box size about 4.92 x 4.76 x 3.94 in; removable knock rod size about 5.35 x 0.98 in; tamper pad size about 2.56 x 2.99 x 0.55 in. Before buying, please note this is a compact espresso dump bin for home or office use, not a large high-volume café knockbox. Confirm your available counter or under-machine space and make sure a small used coffee grounds container fits your brewing volume and routine. Care: Rinse or hand wash with warm soapy water and dry completely before reuse. Do not use abrasive scrubbers.