Glass Tube, Borosilicate, 7.0mm OD x 4.0mm Wall x 12"

One 12" length of borosilicate glass tubing.

Our Kovar wire/tube and sheet provides a reliable glass-to-metal seal against this glass. We can also provide glass tubing in arbitrary lengths, as well as custom glass items (please inquire). Tubes are packed securely for shipping. We will combine shipping for multiple lengths and diameters in the most secure and economical way.

• Material: Borosilicate Glass
• Outside Diameter: 7.0mm ±.05
• Wall Thickness: 4.0mm ±.05
• Length: 12" ±.03 (304.8mm ±.76)
• Ends: Ground
• Coefficient of Thermal Expansion: 3.3 · 10^-6K^-1
• Transformation Temperature: 510°C
• Annealing Point: 565°C
• Softening Point: 820°C
• Working Point: 1,252°C
• Chemical Composition:

  SiO2 80.6%

  B2O3 13.0%

  Na2O 4.0%

  Al2O3 2.3%