Microsolv Headspace Crimp Cap silver, steel, magnetic, 8mm center hole, with reddish Butyl/grey PTFE Septa, for 18mm Crimp Top Headspace vials, 100 pc

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