Zhejiang Aijiren is a Tel: +8618057059123 6-20mL 20mm Crimp-Top Headspace ND20 20mL Crimp-top Headspace Vial, Flat Bottom, 22.5*75.5mm 20mL Crimp-top Headspace Vial, Round Bottom, 22.8*75.5mm. White PTFE/White Silicone Septa, 20mm Crimp-top Aluminum Cap, 10mm Centre Hole Temperatur