Spherical reaction flask with flat, ground KF flange and bottom outlet. Supplied with capacity reference gradations. Nominal flange I. D. is 300 mm (12 inches). Side sample port is angled at 45° (Schott-Duran style flange 2.5 inches in diameter). Main flange opening uses 6525-30 clamp and 6525-51 gasket. Each flask is supplied with one 7855-880 CAPFE (PTFE encapsulated silicone) o-ring for side port.