BTO 400 °C (330 °C for 17 mm size) Low bleed TR-Green 350 °C Long lifetime Marathon 350 °C High mechanical durability TR-Blue 200–250 °C Easy to penetrate for routine applications GC Septa Nature of Sample Vial Type Recommended Routine samples Clear glass (with or without patch) as SureStop 9mm screw thread or 11mm crimp vial Light sensitive