Microsolv Headspace Crimp Cap silver, steel, magnetic, 8mm center hole, with white Sil/blue PTFE Temperature Resistant Septa, for 18mm Crimp Top

Caps, Headspace, Screw Top, with White Silicone Rubber / Blue PTFE Temperature Resistant Septa, fitted in Steel, Magnetic, Silver Caps with 8mm center holes. For use with 18mm Precision Thread Headspace Vials. MicroSolv Brand. 1000/CS.