Microsolv Headspace Crimp Cap silver, aluminium, pressure relief caps, 8mm center hole, white Sil Rubber/Foil Septa, 8mm Center Hole, for 20mm Crimp

Caps, Headspace, Crimp Top, with White Silicone Rubber / Foil (125mil) Septa, fitted in Aluminum, Silver Pressure Relief Caps with 8mm center holes. For use with 20mm Crimp Top Headspace vials. BASIK Brand