Microsolv Headspace Crimp Cap silfer, aluminium, 8mm center hole, pressure relief cap, with translucent blue Sil/white PTFE Septa, for 20mm Crimp Top

Caps, Headspace, Crimp Top, with Translucent Blue Silicone Rubber / White PTFE Septa, fitted in Aluminum, Silver Pressure Relief Caps with 8mm center holes. For use with 20mm Crimp Top Headspace Vials. MicroSolv Brand