Microsolv Headspace Crimp Cap, silver, aluminium, 10 mm center hole, with natural Sil Rubber/Foil (125mil) high purity Septa, for 20mm Crimp Top

Caps, Headspace, Crimp Top, with Natural Silicone Rubber / Foil (125mil), High Purity Septa, fitted in Aluminum, Silver Caps with 10mm center holes. For use with 20mm Crimp Top Headspace Vials. BASIK Brand