20mm Crimp-top Aluminum Caps with Septa ND20 10ml & 20ml crimp top ND20 headspace vial with matched 20mm Aluminum & Magnetic Aluminum cap, 20mm PTFE/rubber septa · Port:Shang hai · Payment Terms:L/C,D/A,D/P,T/T Product Details Product Description 1.Bevelled top design , 2.Available with amber or clear vial.