Microsolv Headspace Cap red, bimetallic, magnetic, 8mm center hole, white Sil Rubber/PTFE septa, SPME-Style, for 20mm Crimp Top Headspace Vials, for

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