Laboratory vial - ND20 - Zhejiang Aijiren Technology, Inc. - PTFE. 7.6ml crimp top headspace vial with matched 20mm Aluminum & Magnetic Aluminum cap, 20mm PTFE/rubber septa Features 1).Crimp caps provide a consistently secure seal 2).Beveled top for maximum secure seal 3).Choice of a pressure safety release cap at 45 psi 4).10/20mL Clear /Amber