Mininert Valve For 18 mm Screw Cap Vials, 12/pk

Mininert valves are very convenient for repetitive sampling and limit content exposure to the silicon septum. Models are available for screw-cap and crimp-top vials. The crimp-top valve for 13 mm ID glassware slides into the neck of the vial. Turn the threaded flange to secure a tight fit.