Thermo™ 18mm Screw Cap, SPME, Blue Silicone/Natural PTFE, 100-pk

These Thermo™ 18mm screw caps are specifically designed for Solid Phase Microextraction (SPME) applications, featuring a pre-slit blue silicone/natural PTFE septum that allows for easy needle penetration while maintaining sample integrity. Ideal for headspace analysis, volatile organic compound testing, and GC/MS applications, these caps provide reliable sealing performance and excellent chemical resistance for demanding analytical workflows.

• Septum Material: Blue silicone/natural PTFE with pre-slit design for SPME fiber insertion
• Cap Size: 18mm diameter screw thread compatible with standard SPME vials
• Chemical Resistance: PTFE layer provides superior inertness and resistance to a wide range of solvents
• Package Quantity: 100 caps per pack for high-throughput laboratory needs
• Applications: Optimized for headspace SPME, environmental testing, food and beverage analysis, and forensic applications
• SKU: 6PMSC18-ST2