Round bottom, HEAVY WALL two necks flask with standard taper outer joints on both the center neck and 20° side neck. Flasks with joint sizes other than those listed are available, please call for pricing

If you need other size of ground joint,please contact us by the leave a message.

Be Made From G3.3 Borosilicate Glass

Annealing Point ------560℃

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

Softening Point------820℃