Aijiren Borosilicate Glass Clear Flat Bottom Headspace Vial, Vial, Blue Screw Cap with Hole, Red PTFE&White Silicone Septa, 100 of Pack by Aijiren. Crimp Top Headspace Cap & Septa - Aijiren Suitable for Crimp Headspace vials for the analysis of volatile organic solids and liquid samples after gasification. crimp cap with butyl septa.