Septum for 20mm Crimp Caps, Blue, PTFE/Silicone, 500-pk

These high-quality PTFE/Silicone septa are designed for use with 20mm crimp caps, providing reliable sealing performance for headspace vials, sample storage, and chromatography applications. The dual-layer construction features a chemically inert PTFE face that contacts the sample, backed by a flexible silicone layer that ensures excellent resealability and consistent needle penetration. Ideal for GC, HPLC, and GC-MS applications where sample integrity and contamination-free analysis are critical.

• Diameter: 20mm, compatible with standard 20mm crimp cap vials
• Dual-layer construction: PTFE (polytetrafluoroethylene) facing with silicone backing
• Blue color coding for easy identification and quality control
• Chemically inert PTFE surface resists a wide range of solvents and aggressive samples
• Excellent resealability for multiple injections with minimal coring
• Convenient 500-piece bulk packaging for high-throughput laboratories