These PYREX® VISTA™ 50 mL micro filtering flasks are recommended for microchemical use. The vacuum hose is attached to the flask's sidearm. A funnel is inserted into the neck of the flask through a ground joint or rubber stopper. The applied vacuum facilitates the filtration process. These flasks have permanent blue enamel marking spots. The 50 mL filtering flask is designed to ASTM E-1406 Type 2.
