![Boro 3.3 or Borosilicate 3.3 is a type of glass having very low coefficient of thermal expansion](https://www.glasscolabs.com/wp-content/uploads/2018/08/001.png)
![White Printing](https://www.glasscolabs.com/wp-content/uploads/2018/08/022.png)
![Chemical Resistant](https://www.glasscolabs.com/wp-content/uploads/2018/04/002-e1534487995427.png)
![Screw Cap](https://www.glasscolabs.com/wp-content/uploads/2018/08/038.png)
![leak proof](https://www.glasscolabs.com/wp-content/uploads/2018/08/044.png)
Tubes
These tubes are chemically clean and well-suited for general use in chemistry, blood banks, hematology and other laboratory procedures. Salient Features:
Each tube is annealed at temperatures over 426.7°C (800°F) to increase strength and reduce breakage. Tubes feature smooth, well-rounded bot toms with no irregularities. Tops are firepolished to eliminate rough edges. Tubes are packed in lint-free packaging and are shrink-film sealed to prevent any contamination from outside sources.