Microsolv Headspace Crimp Cap silver, steel, magnetic, 8mm center hole, with white Sil/silver-foil Septa, for 18mm Crimp Top Headspace vials, 100 pc/

Caps, Headspace, Screw Top, with White Silicone Rubber / Silver Foil Septa, fitted in Steel, Magnetic, Silver Caps with 8mm center holes. For use with 18mm Precision Thread Headspace Vials. MicroSolv Brand