Use Thermo Scientific™ SureSTART™ 18 mm precision screw caps with screw vials that have an 18 mm opening, including our SureSTART 10 ml and 20 ml screw top headspace vials (level 3). Select level 3 products for ultimate performance and sensitivity from your methods, while maintaining the highest levels of sample security and integrity.

Choose from magnetic steel caps with all-purpose silicone/PTFE septa designed to reduce autosampler needle issues. Select high temperature septa to allow for heating to over 250 °C without excessive septum softening or the release of volatile vapors.