RXDZ 3mm Dia Nylon Twisted Handle Test Tube Pipe Bottle Wash Cleaning Brushes – 50PCS


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Overview and Specifications:

Handle Size     0.9mm/ 0.035"(Dia) 
Brush Size     35 x 3mm/ 1.4" x 0.12"(L*D) 
Not just for test tubes, the nylon bristles are great for cleaning all sorts of internal surfaces. 
Features: Twisted handle, A ring for hanging.
It is also very flexible, you can bend it around for hard to reach places.