Feature: 1. Easy Knocking: This ergonomic coffee knock box enables easy knocking to dispose the grounds and improve the working efficiency. 2. Better Design: Bottomless design adds more convenience in collecting the dust and dirt, which can also prevent it from blowing. 3. Practical Use: Allows for extensive uses in home, cafe, restaurant, bar and many other places where coffee needs to be brewed. 4. Good Material: Adopting high quality rubber and stainless steel materials, very sturdy for repeated knocks and long term using. 5. Easy to Install: Compact size will not only save your space, but also simplifies the installation and coffee bean processing. Specification: Item Type: Coffee Knock Box Material: Stainless Steel + Rubber Weight: Approx. 1372 g / 48.4 oz Package List: 1 x Coffee Knock Box