【Product】 This knock box is a container for discarding used coffee grounds after espresso extraction. You knock the portafilter containing the used coffee grounds against the top of the knock bar. 【Features】 * Large opening angle for easy disposal of coffee grounds. * Non-slip rubber base. * Sturdy and sound-dampening knock bar, removable and fixed with screws for easy cleaning. 【Details】 * Made of polished stainless steel. * Height: Approximately 10.4 cm Bottom to the bottom of the opening: Approximately 6.5 cm Bottom of the opening to the top: Approximately 3.9 cm * Diameter: Approximately 11.4 cm * Diameter with non-slip base: Approximately 11.8 cm Non-slip base height: Approximately 1.5 cm Non-slip base thickness: Approximately 3 mm * Weight: Approximately 370 g * Maximum capacity: Approximately 580 ml (holds approximately 7 servings of coffee grounds)