​Yes, it's a grinder brush - just a prettier grinder brush. 
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This standard brush bone is 20.5cm long - much more suitable for the coffee grinder. The 20.5cm includes 17cm of handle, and 3.5cm of bristles.
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This brush is essential for cleaning out your grinder, including the spouts, the dosing chamber, and the coffee bean hopper. The bristles on this brush are made of soft fiber, and the brush has a  Polypropylene handle. It's a necessary item for any espresso bar, and should be part of the tools that you use to clean your espresso grinder.
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With use, essential oils and coffee particles build up in your espresso grinder. If you don't brush them out regularly, they will eventually degrade into acrid deposits within your grinder that will impart "off" characteristics to your freshly ground beans.
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This brush has a 17cm long handle that makes it easy to use - easy to reach into the inner chambers of your espresso grinder. 

​無論家用/商用研磨機, 清潔保養是不可缺少的.  此清潔掃可細緻地掃走粉糟內夾住的咖啡粉, 達到提升咖啡味道的效果. 
咖啡研磨機粉糟專用清潔掃