A test tube (also called a sample tube or culture tube) is a glass (or plastic) piece of tubing with one closed end with the other remaining open.

Being made of borosilicate glass makes these Scrwe top test tubes perfect for reuse, as they can be sterilized with heat.

Spherical bottoms and rounds sides make them easy to wash out for reuse as well as help contain reactive gasses.

Graduated side makes them perfect for comparing samples of similar volume or measuring out quantities of solutions/reagents.

In biology, test tubes are also used for culturing live organisms such as molds, bacteria, mold seedlings etc.

Graduated Screw-top Glass Test Tube Specifications:

– Made of Borosilicate Glass
– Screw top for sealing collected materials

Listing is for individual test tubes. For bulk amounts, see our other listings, or contact us.

Safety Notes:
– Tube should be preheated prior to full heat application, as sudden temperature shocks may shatter glass.
– Take care not to over fill test tube, recommended max volume is 50%
– Use a dropper to add solution to test tube
– Do not use cap for reactions, heating or cooling for fear of breaking glass under pressure.
– Do not suddenly cool too significantly after heating as sudden temperature shocks may shatter glass.

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