These 15×100 mm PYREX round bottom glass Test Tube with Black Cap is useful for the handling of sputum specimens. Digestion, shaking, neutralizing, and centrifuging can be performed in one container. They are also useful for other clinical and microbiological tests. Black Screw caps resist the effects of temperature and steam. These tubes have a black polypropylene GPI 38-400 threaded cap with a Polytetrafluorethylene (PTFE) liner. This is the best-branded test tube which is ideal for sample keeping, and laboratory use. Brand: Pyrex, Origin: China, Supplier: Labzo Bangladesh. 

Premium 4-Inch Pyrex Test Tube with Black Cap

Looking for a reliable and durable test tube for your laboratory, classroom, or DIY project? This 4-inch Pyrex Test Tube with a Black Screw Cap is the ideal choice for demanding applications.

Key Features:

• Exceptional Durability: Crafted from genuine Pyrex (borosilicate glass), this test tube offers superior resistance to thermal shock, chemicals, and mechanical stress compared to standard soda-lime glass. This makes it safe for heating, cooling, and handling a wide range of substances.
• Secure Sealing: The included black screw cap provides an air-tight and liquid-tight seal, making it perfect for safe storage, transport, and culture work. The cap helps prevent evaporation and contamination of your samples.
• Optimal Size: At 4 inches (approximately 100mm) in length, this clear tube is a versatile size for small-volume chemical reactions, sample preparation, small-scale plant tissue culture, or even as a unique storage container for beads, spices, or crafts.
• Crystal Clarity: The clear, high-quality glass ensures excellent visibility, allowing for easy observation of reactions and sample clarity.

Why Choose Pyrex?

Pyrex is the brand scientists trust. Its low coefficient of thermal expansion means you can transition the tube from a Bunsen burner flame to a cold-water bath without fear of it shattering—a critical safety feature in any lab environment.

Perfect For:

• Chemistry Labs: For small-scale reactions, titrations, and heating small liquid volumes.
• Biology & Microbiology: Ideal for preparing and culturing liquid media.
• Educational Settings: A durable and safe option for student experiments and demonstrations.
• General Storage: Excellent for storing small components, dry samples, oils, or craft materials.

Invest in the quality and safety of Pyrex. Order your 4-inch Pyrex Test Tube with Black Cap today!