1.5ml vials septa cap China-Aijiren HPLC VialsDISCRIPTION. 1. 2ml / 1.8mlvial Clear with Screw Cap Black & PTFE Septa (8mm) 2. 2ml/1.8ml Vial Amber with Screw Cap Screw caps [black polypropylene hole cap, thread 8-425, septum thickness 1.5 mm, for use