Vials, 10mL Headspace vial w/ 20mm AL Crimp Cap & Silicone/PTFE Septa, Kit, Round bottom, 500/pk. Vials, 18mm Magnetic Universal Screw Cap & Septa Only, Center Hole; Silicone/PTFE, 100/pk. Vials, 20mL Headspace vial only , Screw Cap Style, 75.5 x 22.5mm, clear glass, round bottom, 100/pk.