Microsolv Headspace Cap red, magnetic, 20 mm, with Sil/PTFE septa, SPME-Style, Thick, 100 pc/PAK

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