Test Tube Brush
The Test Tube brush is mainly used for cleaning test tubes in chemical laboratories.

Its handle is made of metal such as iron, and its upper end is a tough cylindrical brush with some protruding bristles.For different lengths and diameters of the test tube, the brush also has different sizes.

Method of use
The tube to be cleaned will be moistened or filled with 1/2 volume of distilled water, then the tube will be brushed into the inside of the tube, making the top stiff hairs stick to the bottom of the tube, then up and down the tube brush handle to clean the inner wall of the tube, and turn the tube brush at the same time.After cleaning, take out the tube brush. If the distilled water in the test tube neither gathers into water drops, nor flows down, clean up.Then pour the test tube onto the test tube rack.

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