Wide neck Erlenmeyer Conical Flask 500mL capacity High quality borosilicate glass 7" height, 4" diameter A high quality wide neck Erlenmeyer Conical Flask made of borosilicate glass and possessing a capacity of 500mL. As per DIN ISO 24450 standard. 7" height x 4" diameter Eisco Labs Borosilicate glass has the following heat tolerances: Strain Point -515°C | Annealing Point 565°C | Softening Point 820°C