20 mm Screw Cap Mininert Valve (12/pk)

Mininert valves are highly reliable, leak-proof closures for screw cap vials and other laboratory containers. When used with a glass vial, only PTFE and glass are in contact with the contents. Due to their unique properties, Mininert valves are ideal closures for calibration standards, air or moisture sensitive fluids, derivatization agents or volatile chemicals. Easy installation, replaceable septa. Press the green button to open the valve, insert the needle through the septum and collect the sample, then remove the needle and close the valve with the red button.