Microsolv Headspace Crimp Cap blue, bimetallic, magnetic, 8mm center hole, with Sil Rubber/PTFE Septa, SPME-Style, Thick, for 20mm Crimp Top Headspace

Caps, Headspace, Crimp Top, with White Silicone Rubber / Blue PTFE SPME Style Septa, fitted in Bimetallic, Magnetic, Blue Caps with 8mm center holes. For use with 20mm Crimp Top Headspace Vials. BASIK Brand