Headspace Vials, 20 mm, Septa, White PTFE/Red Silicone, 250-pk

These premium 20 mm headspace vial septa feature a White PTFE/Red Silicone construction, engineered for reliable performance in headspace gas chromatography (GC) and GC-MS applications. The dual-layer design combines the chemical inertness of PTFE with the excellent resealing properties of silicone, making them ideal for volatile organic compound (VOC) analysis, residual solvent testing, and environmental sample analysis in pharmaceutical, food and beverage, and environmental laboratories.

• Dual-Layer Construction: White PTFE facing provides superior chemical resistance while red silicone backing ensures optimal sealing and needle penetration
• Universal 20 mm Diameter: Compatible with standard 20 mm crimp-top headspace vials from major instrument manufacturers
• Low Bleed Formulation: Minimizes background interference for cleaner chromatographic baselines and improved analytical accuracy
• Excellent Resealing Properties: Silicone layer allows multiple injections while maintaining sample integrity
• Convenient Pack Size: 250 septa per package for high-throughput laboratory environments
• SKU: 502 158