20mm Crimp-Top Headspace vials - CLS Products Made In China, China Manufacturer. 6-20mL 20mm Crimp-Top Headspace vials ND20 10ml & 20ml crimp top ND20 headspace vial with matched 20mm Aluminum & Magnetic Aluminum cap, 20mm PTFE/rubber septa Product Description: 1.Bevelled top design , suitable PE,Tekmar ,CTC PAL,Varian,Gerstel,Shimadzu