Round bottom, HEAVY WALL flask with a standard taper outer joint and a #7  as a side neck for insertion of thermometers or bleed tubes having an O.D. between 4 and 7mm.

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Be Made From G3.3 Borosilicate Glass

Annealing Point ------560℃

Linear Coefficient of Expansion------ 33×10-7/℃

Softening Point------820℃