YOKIVE 1 Set Watch Glass Beaker Cover, Lab Watch Glasses Cover Lids | Lab Supplies, Great for Science (Transparent, 2.36-Inch/3.54-Inch/4.72-Inch/...

YOKIVE 1 Set Watch Glass Beaker Cover, Lab Watch Glasses Cover Lids | Lab Supplies, Great for Science (Transparent, 2.36-Inch/3.54-Inch/4.72-Inch/5.91-Inch)
?MULTIPURPOSE - Commonly used in scientific experiments and laboratory processes, such as evaporating solvents or heating small specimens, it can additionally be positioned over evaporating dishes or beakers to prevent dust from entering, and it can also serve as a cover for other chemical containers.
?WHAT YOU GET - The package comes with 4pcs watch glasses that measure diameter is 60mm / 2.36 Inch, 90mm / 3.54 Inch, 120mm / 4.72 Inch, 150mm / 5.91 Inch and thickness is 2 mm/ 0.08''.
?RELIABLE MATERIAL - Composed of glass featuring high chemical durability and corrosion resistance, it can effectively maintain the purity of the material, increase the liquid surface area to accelerate evaporation, etc. It is reusable, and easy to clean.
?SPECIAL DESIGNED - Watch glasses are circular glass discs, which serves as an indispensable laboratory container for holding or blending small quantities of liquid or powder. The edges and surface of each cover have been polished, and the surface is carefully treated for safe operation.
?KINDLY NOTE - Watch glasses should not be directly exposed to fire in order to prevent cracking, and it is not suitable for use as an evaporating dish. It is important to select a surface dish based on the instrument's caliber, with the diameter generally being 1cm larger than that of the instrument for added convenience during use.

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