Colorimetric tube is the main instrument used for visual colorimetric analysis in chemical experiments, and can be used to roughly measure the concentration of a solution. 

* Borosilicate Glass: crafted from premium borosilicate glass for high transparency and clear color comparison; features a frosted mouth for enhanced sealability and durability 

* High Transparency: Features excellent transparency, allowing easy observation of the internal process and convenient monitoring of the experiment 

* Glass Piston: Design ensures the sealing performance,which can be used to storing handmade beads,powders and liquid clear test tube is very convenient to storage and carry