Kontes® Graduated Addition Funnels with ST Joints and PTFE Metering Plug
Graduated addition funnel that incorporates the use of a Kontes® PTFE "Varibor" metering plug. Turning the adjusting knob allows control of flow rate from dropwise to full flow. This feature facilitates reproducible addition rates. Cats.No. 186-299261-0025 and 186-299321-0050 are supplied without a stopper.