Valve, Mininert, 18-400 GPI, pack/12

Valve, Mininert, 18-400 GPI. These resealable valves allow repeated and unlimited syringe-needle access to samples. Slide the valve one way to open the needle-port. Slide the valve back to close and completely seal. Models are available for screw-cap and crimp-top vials. The screw-cap Mininert is available in 13, 15, 18, 20, and 24mm cap sizes. The 20mm crimp seal (13mm ID Neck) valve for features a serrated flange which allows the valve to turned and inserted into the glassware neck of the vial and provide a leak-tight fit. Made in the United States.