Microsolv Headspace Crimp Cap, gold, steel, magnetic, 5mm center hole, with white Sil Rubber/blue PTFE high purity Septa, for 20mm Crimp Top Headspace

Caps, Headspace, Crimp Top, with White Silicone Rubber / Blue PTFE High Purity Septa, fitted in Steel, Magnetic, Gold Caps with 5mm center holes. For use with 20mm Crimp Top Headspace Vials. BASIK Brand