Closures, SureSTART™, Level 3 Precision Screw Caps, 18mm, High Performance Applications

Use Thermo Scientific SureSTART 18mm Precision Screw Caps with screw vials that have an 18mm opening, including our SureSTART 10mL and 20mL 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.

Our performance Level 3 caps are specially designed and treated for mass spectrometry applications and contain the lowest amounts of metals, extractables, and leachables, ensuring that you consistently achieve sensitivity and selectivity from your most challenging analytes.