These graduated dropping funnels feature a pressure-equalising side arm, allowing solvent to be added to a mixture in a sealed system. The easy-to-read dual scale is calibrated from outlet to show approximate volume contained in and dispensed from the funnel.

Manufactured in compliance with BS ISO 4800:1998 from borosilicate glass with a stopcock for fine control of liquid flow and interchangeable PTFE stopcock-key.