20mm Aluminum Crimp Caps with PTFE/Silicone Septa, Silver (100-pk) | SKU: 21763

These premium 20mm aluminum crimp caps feature a PTFE/silicone composite septum, engineered to deliver exceptional chemical resistance and reliable sealing performance for chromatography vials, headspace analysis, and sample storage applications. The PTFE-faced silicone septa provide an inert barrier against aggressive solvents while maintaining excellent resealability, making them ideal for GC, HPLC, and mass spectrometry workflows in pharmaceutical, environmental, and analytical laboratories.

• Diameter: 20mm standard crimp cap configuration compatible with 20mm headspace vials and crimp-top containers
• Septum Composition: PTFE/Silicone dual-layer design – PTFE face provides chemical inertness while silicone backing ensures optimal compression and seal integrity
• Cap Material: High-quality aluminum with silver finish for easy visual identification and secure crimping
• Chemical Compatibility: Resistant to most organic solvents, acids, and bases; suitable for headspace, GC, and volatile compound analysis
• Temperature Range: Suitable for applications ranging from -40°C to +200°C
• Package Quantity: 100 caps per package for efficient laboratory inventory management