1.Material:Neutral Glass
2.Test tube,the commonly used instruments in the chemistry lab, is used as the reaction vessel in a small amount of reagent and used in room temperature or heat.(should be preheated before heating or tube easy blowout)

1.High quality inert 3.3 borosilicate glass.
2.Clear and accurate metric scale.
3.Low linear coefficient of expansion and high annealing point
4.With plug.
5.Glass Graduated Test Tube.

1.Material:Neutral Glass
2.Test tube,the commonly used instruments in the chemistry lab, is used as the reaction vessel in a small amount of reagent and used in room temperature or heat.(should be preheated before heating or tube easy blowout)