Vials, 20mL Headspace vial only, Crimp Cap Style, 75,5 x 22.5mm, clear glass, Round bottom, 100/pk. Vials, 20mL Headspace vial only, Screw Cap Style, 75.5 x 22.5mm, clear glass, flat bottom, 100/pk. Vials, 20ml Headspace vial w/ 18mm Magn Screw Cap & Silicone/PTFE Septa, Kit, round bottom, 100/pk.