8-425mm Black Cap with Red PTFE/White Silicone Septa, 100-pk (C4013-60A)

These premium 8-425 threaded black caps feature a high-quality red PTFE/white silicone septum, engineered to provide exceptional chemical resistance and reliable sealing performance for autosampler vials. Ideal for HPLC, GC, and mass spectrometry applications, this cap and septa combination ensures sample integrity while minimizing contamination risk in analytical laboratories handling volatile compounds, solvents, and sensitive samples.

• Thread Size: 8-425mm standard screw thread for universal compatibility with standard autosampler vials
• Septum Composition: Red PTFE (polytetrafluoroethylene) bonded to white silicone for optimal chemical inertness and resealability
• Cap Material: Black polypropylene construction for durability and easy sample identification
• Chemical Resistance: PTFE layer provides superior resistance to aggressive solvents and acids
• Package Quantity: 100 caps per pack for cost-effective laboratory supply management
• Applications: Suitable for HPLC, GC, GC-MS, and general chromatography sample storage and analysis