Specifications: It is strong and sturdy, and tucks away on the drip tray of your espresso machine for space-saving storage. Shock absorbing design with a non-slip base prevent shifting during using. The item helps prevents coffee grounds from splashing all around. It can be used in coffee shop, restaurant, bar and more. Item Name: Coffee Knock Box Material: ABS Features: Easy to Use, Coffee Machine Accessory, Wide Application Size: 11cm x 10.5cm/4.33" x 4.13" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Coffee Knock Box