Test Tubes 25 ml

The characteristics of a test tube like the one pictured include the following:

Materials:
Clear glass (such as soda-lime glass or borosilicate).

Shape:
A narrow cylindrical body with a base that can be round (U-shaped), conical (V-shaped), or flat, and a top opening. The image shows a flat bottom.

Dimensions and Capacity:
Test tubes come in various sizes and volumes. The one pictured is graduated up to 25 ml, with an accuracy indication of “±0.2”. The visible graduations are 5, 10, 15, 20, and 25 ml.

Use:
Used in laboratories to hold, mix, and heat chemicals, or for specific analyses such as food quality control or blood tests. The object in the image, being graduated, is more specifically a flask, used to precisely measure liquid volumes.

Resistance:
Resistance to temperature changes and chemicals varies depending on the type of glass.