17.5cm Knock Bin BlackThis beautiful black 17. 5cm (tall) knock bin is ideal for use at home or in a small cafe. By using a knock bin to cleanly knock out used coffee grind, you will ensure the long life of your group handle. When you scrape or grind your group handle with a spoon or knife you may end up scratching or denting it. This stylish knock bin is a great addition to the side of any coffee machine! Key Features: Made from hard wearing polypropylene Solid rubber