3.Available with 20ml or 10ml vial. 4.Magnetic Aluminum cap suit for CTC instrument. 5.Butyl/PTFE, Pharma-Fix-Liner (Butyl/PTFE), Silicone/PTFE are all Available. 6.Rounded or flat bottom profiles are available for accurate instrument compatibility. 7.6ml crimp top headspace vial with matched. 20mm Aluminum & Magnetic Aluminum cap, 20mm PTFE