The volumetric flask is used to accurately prepare a liquid solution of a certain substance's concentration. These flasks are suitable for use in professional laboratories and other settings where chemicals are used.

Specification
Capacity:5ml
Color: Clear
Material: 3.3 Borosilicate Glass
Size:93 X 22mm/3.66 X 0.87 inch (H*OD)
Flask Neck Outer Diameter:12mm / 0.47 inch
Flask Neck Inner Diameter:11mm / 0.43 inch
Flask Cap Diameter:9 mm / 0.35 inch
Tolerance:20 degrees celsius±0.02ml
Packing List:10Pcs X Volumetric Flask

Advantage
1. The volumetric flask and the stopper are made of low expansion coefficient thickened borosilicate glass which can resist high and low temperatures and has superior chemical durability.
2. The bottle mouth has a glass stopper to reduce evaporation and prevent liquid leakage. The long neck shape is convenient for holding and shaking to mix liquid.
3. The transparent bottle body and accurate white graduation line ensure the accuracy of your experiments.

Instruction
When pouring liquid, use a glass rod to slowly transfer the solution, when the liquid is close to the scale line, you can use a dropper to drip slowly until the liquid concave surface reaches the scale line, tighten the stopper of the bottle and shake moderately to mix the liquid evenly.

Note: Please use it with care to avoid damage. When mixing liquids, make sure the cap is tightly closed. When you finish using the volumetric flask, please remember to clean it and ensure it is dry after cleaning.