Microsolv Headspace Crimp Cap silver, steel, magnetic, 8mm center hole, with blue Sil/transparent PTFE Septa, for 18mm Crimp Top Headspace vials, 100

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