General description Compact coffee knock box designed for grinding coffee. Sturdy construction that plugs into the drip tray of your coffee machine. Ergonomic design for easy knocking, keeping the work area clean. Suitable for families, cafes, western restaurants, bars, and other coffee-making environments. Technical specifications Color: Black Material: Metal Size: Approximately 18 x 16.5 x 11 cm Package Contents: 1 x Bottomless Knock Box Measurement allowed error: +/- 1-3 cm