Essential with any pump espresso machine, the De’Longhi knock box is perfect for dump the coffee pucks from the filter.
Made of stainless steel with a 4 inches (10.5cm) diameter it has a 40 degree angled shape at the top to make removal of coffee easier.  
Anti slip rubber pads on the base ensure it won’t move on the surface.
It will contain about 10 single coffee pucks.